31609955412 has 72 divisors (see below), whose sum is σ = 91421710016. Its totient is φ = 9021124224.

The previous prime is 31609955387. The next prime is 31609955453. The reversal of 31609955412 is 21455990613.

31609955412 is a `hidden beast` number, since 3 + 1 + 6 + 0 + 99 + 554 + 1 + 2 = 666.

It is a super-2 number, since 2×31609955412² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151488 + ... + 293544.

Almost surely, 2^31609955412 is an apocalyptic number.

It is an amenable number.

31609955412 is an abundant number, since it is smaller than the sum of its proper divisors (59811754604).

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

31609955412 is a wasteful number, since it uses less digits than its factorization.

31609955412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142957 (or 142952 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 31609955412 in words is "thirty-one billion, six hundred nine million, nine hundred fifty-five thousand, four hundred twelve".