15122310111872 has 128 divisors (see below), whose sum is σ = 30921562425600. Its totient is φ = 7363297751040.

The previous prime is 15122310111803. The next prime is 15122310111901. The reversal of 15122310111872 is 27811101322151.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×15122310111872² (a number of 27 digits) contains 22 as substring.

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, 1165130279 + ... + 1165143257.

It is an arithmetic number, because the mean of its divisors is an integer number (241574706450).

Almost surely, 2^{15122310111872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15122310111872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15460781212800).

15122310111872 is an abundant number, since it is smaller than the sum of its proper divisors (15799252313728).

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

15122310111872 is a wasteful number, since it uses less digits than its factorization.

15122310111872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13994 (or 13982 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 35.

The spelling of 15122310111872 in words is "fifteen trillion, one hundred twenty-two billion, three hundred ten million, one hundred eleven thousand, eight hundred seventy-two".