15925591920 has 480 divisors, whose sum is σ = 60644118528. Its totient is φ = 3440295936.

The previous prime is 15925591919. The next prime is 15925591949. The reversal of 15925591920 is 2919552951.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 15925591920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26236257 + ... + 26236863.

Almost surely, 2^15925591920 is an apocalyptic number.

15925591920 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 15925591920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30322059264).

15925591920 is an abundant number, since it is smaller than the sum of its proper divisors (44718526608).

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

15925591920 is a wasteful number, since it uses less digits than its factorization.

15925591920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 48.

The spelling of 15925591920 in words is "fifteen billion, nine hundred twenty-five million, five hundred ninety-one thousand, nine hundred twenty".