31405604725 has 48 divisors (see below), whose sum is σ = 44389908864. Its totient is φ = 21818016000.

The previous prime is 31405604717. The next prime is 31405604729. The reversal of 31405604725 is 52740650413.

It is not a de Polignac number, because 31405604725 - 2³ = 31405604717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31405604729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5392315 + ... + 5398135.

It is an arithmetic number, because the mean of its divisors is an integer number (924789768).

Almost surely, 2^31405604725 is an apocalyptic number.

It is an amenable number.

31405604725 is a deficient number, since it is larger than the sum of its proper divisors (12984304139).

31405604725 is a wasteful number, since it uses less digits than its factorization.

31405604725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718 (or 6713 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 31405604725 in words is "thirty-one billion, four hundred five million, six hundred four thousand, seven hundred twenty-five".