31690397596 has 48 divisors (see below), whose sum is σ = 65191569408. Its totient is φ = 13288939200.

The previous prime is 31690397593. The next prime is 31690397611. The reversal of 31690397596 is 69579309613.

It is a self number, because there is not a number n which added to its sum of digits gives 31690397596.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31690397593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027561 + ... + 1057951.

It is an arithmetic number, because the mean of its divisors is an integer number (1358157696).

Almost surely, 2^31690397596 is an apocalyptic number.

It is an amenable number.

31690397596 is an abundant number, since it is smaller than the sum of its proper divisors (33501171812).

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

31690397596 is a wasteful number, since it uses less digits than its factorization.

31690397596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32242 (or 32240 counting only the distinct ones).

The product of its (nonzero) digits is 8266860, while the sum is 58.

The spelling of 31690397596 in words is "thirty-one billion, six hundred ninety million, three hundred ninety-seven thousand, five hundred ninety-six".