Search a number
-
+
80887791856960 = 265112383101911813
BaseRepresentation
bin10010011001000100101000…
…000110011010110101000000
3101121101210112021212011221101
4102121010220012122311000
541100231144203410320
6444011201045104144
723015643613313164
oct2231045006326500
9347353467764841
1080887791856960
1123856357843420
1290a47199b8054
1336198bc30ac3a
1415d8dc085aca4
159541252ccc0a
hex49912819ad40

80887791856960 has 448 divisors, whose sum is σ = 222138524805120. Its totient is φ = 27766281297920.

The previous prime is 80887791856951. The next prime is 80887791856969. The reversal of 80887791856960 is 6965819778808.

It is an interprime number because it is at equal distance from previous prime (80887791856951) and next prime (80887791856969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80887791856969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6847348014 + ... + 6847359826.

It is an arithmetic number, because the mean of its divisors is an integer number (495844921440).

Almost surely, 280887791856960 is an apocalyptic number.

80887791856960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80887791856960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111069262402560).

80887791856960 is an abundant number, since it is smaller than the sum of its proper divisors (141250732948160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80887791856960 is a wasteful number, since it uses less digits than its factorization.

80887791856960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12966 (or 12956 counting only the distinct ones).

The product of its (nonzero) digits is 2926264320, while the sum is 82.

The spelling of 80887791856960 in words is "eighty trillion, eight hundred eighty-seven billion, seven hundred ninety-one million, eight hundred fifty-six thousand, nine hundred sixty".