31256668007 has 16 divisors (see below), whose sum is σ = 32261224800. Its totient is φ = 30260926080.

The previous prime is 31256667929. The next prime is 31256668019. The reversal of 31256668007 is 70086665213.

It is a cyclic number.

It is not a de Polignac number, because 31256668007 - 2²⁴ = 31239890791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31256668207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6524369 + ... + 6529157.

It is an arithmetic number, because the mean of its divisors is an integer number (2016326550).

Almost surely, 2^31256668007 is an apocalyptic number.

31256668007 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

31256668007 is a deficient number, since it is larger than the sum of its proper divisors (1004556793).

31256668007 is a wasteful number, since it uses less digits than its factorization.

31256668007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5666.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 31256668007 in words is "thirty-one billion, two hundred fifty-six million, six hundred sixty-eight thousand, seven".