31396957556 has 24 divisors (see below), whose sum is σ = 55578405960. Its totient is φ = 15517517312.

The previous prime is 31396957519. The next prime is 31396957589. The reversal of 31396957556 is 65575969313.

It can be written as a sum of positive squares in 4 ways, for example, as 4675824400 + 26721133156 = 68380^2 + 163466^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31396957495 and 31396957504.

It is a congruent number.

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, 1417640 + ... + 1439616.

It is an arithmetic number, because the mean of its divisors is an integer number (2315766915).

Almost surely, 2^31396957556 is an apocalyptic number.

It is an amenable number.

31396957556 is a deficient number, since it is larger than the sum of its proper divisors (24181448404).

31396957556 is a wasteful number, since it uses less digits than its factorization.

31396957556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26083 (or 26081 counting only the distinct ones).

The product of its digits is 22963500, while the sum is 59.

The spelling of 31396957556 in words is "thirty-one billion, three hundred ninety-six million, nine hundred fifty-seven thousand, five hundred fifty-six".