31613653870 has 16 divisors (see below), whose sum is σ = 59378689440. Its totient is φ = 12095658784.

The previous prime is 31613653859. The next prime is 31613653873. The reversal of 31613653870 is 7835631613.

It is a happy number.

It is a super-2 number, since 2×31613653870² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31613653873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68725105 + ... + 68725564.

It is an arithmetic number, because the mean of its divisors is an integer number (3711168090).

Almost surely, 2^31613653870 is an apocalyptic number.

31613653870 is a deficient number, since it is larger than the sum of its proper divisors (27765035570).

31613653870 is a wasteful number, since it uses less digits than its factorization.

31613653870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137450699.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 31613653870 in words is "thirty-one billion, six hundred thirteen million, six hundred fifty-three thousand, eight hundred seventy".