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BaseRepresentation
bin10010010011100000111100…
…110011010111011001011001
3101120001021202200200010010101
4102103200330303113121121
541023002024044004421
6443115521032415401
722646233634352301
oct2223407463273131
9346037680603111
1080505887094361
112371939a531783
1290426b6847561
1335bc898866c81
1415c47119d6601
15949222301191
hex49383ccd7659

80505887094361 has 16 divisors (see below), whose sum is σ = 82425749648704. Its totient is φ = 78588202662144.

The previous prime is 80505887094341. The next prime is 80505887094377. The reversal of 80505887094361 is 16349078850508.

80505887094361 is a nontrivial binomial coefficient, being equal to C(12689042, 2).

It is a cyclic number.

It is not a de Polignac number, because 80505887094361 - 27 = 80505887094233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80505887094293 and 80505887094302.

It is not an unprimeable number, because it can be changed into a prime (80505887094341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545554990 + ... + 545702536.

It is an arithmetic number, because the mean of its divisors is an integer number (5151609353044).

Almost surely, 280505887094361 is an apocalyptic number.

80505887094361 is the 12689041-st triangular number and also the 6344521-st hexagonal number.

80505887094361 is the 5180280-th hex number and also the 4229681-st centered nonagonal number.

It is an amenable number.

80505887094361 is a deficient number, since it is larger than the sum of its proper divisors (1919862554343).

80505887094361 is a wasteful number, since it uses less digits than its factorization.

80505887094361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154840.

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 80505887094361 in words is "eighty trillion, five hundred five billion, eight hundred eighty-seven million, ninety-four thousand, three hundred sixty-one".