15972644666118 has 32 divisors (see below), whose sum is σ = 36640703211264. Its totient is φ = 4547137622112.

The previous prime is 15972644666107. The next prime is 15972644666141. The reversal of 15972644666118 is 81166644627951.

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, 686452380 + ... + 686475647.

It is an arithmetic number, because the mean of its divisors is an integer number (1145021975352).

Almost surely, 2^{15972644666118} is an apocalyptic number.

15972644666118 is an abundant number, since it is smaller than the sum of its proper divisors (20668058545146).

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

15972644666118 is a wasteful number, since it uses less digits than its factorization.

15972644666118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372928316.

The product of its digits is 104509440, while the sum is 66.

The spelling of 15972644666118 in words is "fifteen trillion, nine hundred seventy-two billion, six hundred forty-four million, six hundred sixty-six thousand, one hundred eighteen".