31307768836 has 12 divisors (see below), whose sum is σ = 54814712400. Its totient is φ = 15646422440.

The previous prime is 31307768831. The next prime is 31307768839. The reversal of 31307768836 is 63886770313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31307768831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856050 + ... + 1872841.

It is an arithmetic number, because the mean of its divisors is an integer number (4567892700).

Almost surely, 2^31307768836 is an apocalyptic number.

It is an amenable number.

31307768836 is a deficient number, since it is larger than the sum of its proper divisors (23506943564).

31307768836 is a wasteful number, since it uses less digits than its factorization.

31307768836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730994 (or 3730992 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 31307768836 in words is "thirty-one billion, three hundred seven million, seven hundred sixty-eight thousand, eight hundred thirty-six".