31609254408 has 32 divisors (see below), whose sum is σ = 81572271360. Its totient is φ = 10196533440.

The previous prime is 31609254371. The next prime is 31609254421. The reversal of 31609254408 is 80445290613.

It is a self number, because there is not a number n which added to its sum of digits gives 31609254408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21242035 + ... + 21243522.

It is an arithmetic number, because the mean of its divisors is an integer number (2549133480).

Almost surely, 2^31609254408 is an apocalyptic number.

It is an amenable number.

31609254408 is an abundant number, since it is smaller than the sum of its proper divisors (49963016952).

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

31609254408 is a wasteful number, since it uses less digits than its factorization.

31609254408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42485597 (or 42485593 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 31609254408 in words is "thirty-one billion, six hundred nine million, two hundred fifty-four thousand, four hundred eight".