15855125880 has 64 divisors (see below), whose sum is σ = 51889507200. Its totient is φ = 3843666560.

The previous prime is 15855125861. The next prime is 15855125911. The reversal of 15855125880 is 8852155851.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6004410 + ... + 6007049.

It is an arithmetic number, because the mean of its divisors is an integer number (810773550).

Almost surely, 2^15855125880 is an apocalyptic number.

15855125880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15855125880 is an abundant number, since it is smaller than the sum of its proper divisors (36034381320).

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

15855125880 is a wasteful number, since it uses less digits than its factorization.

15855125880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12011484 (or 12011480 counting only the distinct ones).

The product of its (nonzero) digits is 640000, while the sum is 48.

The spelling of 15855125880 in words is "fifteen billion, eight hundred fifty-five million, one hundred twenty-five thousand, eight hundred eighty".