31681342658 has 16 divisors (see below), whose sum is σ = 54313156800. Its totient is φ = 13577147376.

The previous prime is 31681342643. The next prime is 31681342669. The reversal of 31681342658 is 85624318613.

It is a super-2 number, since 2×31681342658² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631793 + ... + 680091.

It is an arithmetic number, because the mean of its divisors is an integer number (3394572300).

Almost surely, 2^31681342658 is an apocalyptic number.

31681342658 is a deficient number, since it is larger than the sum of its proper divisors (22631814142).

31681342658 is a wasteful number, since it uses less digits than its factorization.

31681342658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95161.

The product of its digits is 829440, while the sum is 47.

The spelling of 31681342658 in words is "thirty-one billion, six hundred eighty-one million, three hundred forty-two thousand, six hundred fifty-eight".