15397722912 has 96 divisors (see below), whose sum is σ = 47485327680. Its totient is φ = 4307051520.

The previous prime is 15397722889. The next prime is 15397722931. The reversal of 15397722912 is 21922779351.

It is a tau number, because it is divible by the number of its divisors (96).

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

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, 547087 + ... + 574542.

It is an arithmetic number, because the mean of its divisors is an integer number (494638830).

Almost surely, 2^15397722912 is an apocalyptic number.

15397722912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15397722912 is an abundant number, since it is smaller than the sum of its proper divisors (32087604768).

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

15397722912 is a wasteful number, since it uses less digits than its factorization.

15397722912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121666 (or 1121658 counting only the distinct ones).

The product of its digits is 476280, while the sum is 48.

The spelling of 15397722912 in words is "fifteen billion, three hundred ninety-seven million, seven hundred twenty-two thousand, nine hundred twelve".