Search a number
-
+
1868863469440 = 275112412272593
BaseRepresentation
bin11011001100100000111…
…100010111011110000000
320121122212022022212111211
4123030200330113132000
5221104413022010230
63550313302015504
7252010115246362
oct33144074273600
96548768285454
101868863469440
11660642786500
12262246717594
1310730508b566
146664c496d32
15339304b942a
hex1b320f17780

1868863469440 has 384 divisors, whose sum is σ = 5054720902560. Its totient is φ = 659836108800.

The previous prime is 1868863469413. The next prime is 1868863469449. The reversal of 1868863469440 is 449643688681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868863469449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 720732784 + ... + 720735376.

Almost surely, 21868863469440 is an apocalyptic number.

1868863469440 is a gapful number since it is divisible by the number (10) 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 1868863469440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2527360451280).

1868863469440 is an abundant number, since it is smaller than the sum of its proper divisors (3185857433120).

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

1868863469440 is a wasteful number, since it uses less digits than its factorization.

1868863469440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902 (or 2879 counting only the distinct ones).

The product of its (nonzero) digits is 191102976, while the sum is 67.

The spelling of 1868863469440 in words is "one trillion, eight hundred sixty-eight billion, eight hundred sixty-three million, four hundred sixty-nine thousand, four hundred forty".