15904793840 has 80 divisors (see below), whose sum is σ = 40127494176. Its totient is φ = 5827660800.

The previous prime is 15904793837. The next prime is 15904793857. The reversal of 15904793840 is 4839740951.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77870 + ... + 194610.

Almost surely, 2^15904793840 is an apocalyptic number.

15904793840 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 15904793840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20063747088).

15904793840 is an abundant number, since it is smaller than the sum of its proper divisors (24222700336).

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

15904793840 is a wasteful number, since it uses less digits than its factorization.

15904793840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116898 (or 116892 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 15904793840 in words is "fifteen billion, nine hundred four million, seven hundred ninety-three thousand, eight hundred forty".