31661525410512 has 80 divisors (see below), whose sum is σ = 81826887535680. Its totient is φ = 10549376640000.

The previous prime is 31661525410507. The next prime is 31661525410561. The reversal of 31661525410512 is 21501452516613.

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, 1323132564 + ... + 1323156492.

It is an arithmetic number, because the mean of its divisors is an integer number (1022836094196).

Almost surely, 2^{31661525410512} is an apocalyptic number.

It is an amenable number.

31661525410512 is an abundant number, since it is smaller than the sum of its proper divisors (50165362125168).

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

31661525410512 is a wasteful number, since it uses less digits than its factorization.

31661525410512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34452 (or 34446 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 31661525410512 in words is "thirty-one trillion, six hundred sixty-one billion, five hundred twenty-five million, four hundred ten thousand, five hundred twelve".