15961426320 has 160 divisors (see below), whose sum is σ = 58373406720. Its totient is φ = 3530626560.

The previous prime is 15961426279. The next prime is 15961426333. The reversal of 15961426320 is 2362416951.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101160 + ... + 205319.

It is an arithmetic number, because the mean of its divisors is an integer number (364833792).

Almost surely, 2^15961426320 is an apocalyptic number.

15961426320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15961426320 is an abundant number, since it is smaller than the sum of its proper divisors (42411980400).

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

15961426320 is a wasteful number, since it uses less digits than its factorization.

15961426320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306533 (or 306527 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 15961426320 in words is "fifteen billion, nine hundred sixty-one million, four hundred twenty-six thousand, three hundred twenty".