15918982320 has 40 divisors (see below), whose sum is σ = 49348845936. Its totient is φ = 4245061888.

The previous prime is 15918982307. The next prime is 15918982361. The reversal of 15918982320 is 2328981951.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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 15918982320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33164307 + ... + 33164786.

Almost surely, 2^15918982320 is an apocalyptic number.

15918982320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15918982320 is an abundant number, since it is smaller than the sum of its proper divisors (33429863616).

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

15918982320 is a wasteful number, since it uses less digits than its factorization.

15918982320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66329109 (or 66329103 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 15918982320 in words is "fifteen billion, nine hundred eighteen million, nine hundred eighty-two thousand, three hundred twenty".