31355618804 has 12 divisors (see below), whose sum is σ = 54873765828. Its totient is φ = 15677400000.

The previous prime is 31355618753. The next prime is 31355618807. The reversal of 31355618804 is 40881655313.

It can be written as a sum of positive squares in 2 ways, for example, as 26196069904 + 5159548900 = 161852^2 + 71830^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31355618807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127154 + ... + 280854.

It is an arithmetic number, because the mean of its divisors is an integer number (4572813819).

Almost surely, 2^31355618804 is an apocalyptic number.

It is an amenable number.

31355618804 is a deficient number, since it is larger than the sum of its proper divisors (23518147024).

31355618804 is a wasteful number, since it uses less digits than its factorization.

31355618804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204706 (or 204704 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 31355618804 in words is "thirty-one billion, three hundred fifty-five million, six hundred eighteen thousand, eight hundred four".