31607388406 has 24 divisors (see below), whose sum is σ = 52134827472. Its totient is φ = 14360979600.

The previous prime is 31607388353. The next prime is 31607388409. The reversal of 31607388406 is 60488370613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31607388409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 579636 + ... + 631816.

It is an arithmetic number, because the mean of its divisors is an integer number (2172284478).

Almost surely, 2^31607388406 is an apocalyptic number.

31607388406 is a deficient number, since it is larger than the sum of its proper divisors (20527439066).

31607388406 is a wasteful number, since it uses less digits than its factorization.

31607388406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54708 (or 54697 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 31607388406 in words is "thirty-one billion, six hundred seven million, three hundred eighty-eight thousand, four hundred six".