31166640561612 has 12 divisors (see below), whose sum is σ = 72722161310456. Its totient is φ = 10388880187200.

The previous prime is 31166640561611. The next prime is 31166640561613. The reversal of 31166640561612 is 21616504666113.

It is an interprime number because it is at equal distance from previous prime (31166640561611) and next prime (31166640561613).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31166640561611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298610023389 + ... + 1298610023412.

Almost surely, 2^{31166640561612} is an apocalyptic number.

It is an amenable number.

31166640561612 is an abundant number, since it is smaller than the sum of its proper divisors (41555520748844).

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

31166640561612 is a wasteful number, since it uses less digits than its factorization.

31166640561612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597220046808 (or 2597220046806 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 31166640561612 in words is "thirty-one trillion, one hundred sixty-six billion, six hundred forty million, five hundred sixty-one thousand, six hundred twelve".