31053720667 has 24 divisors (see below), whose sum is σ = 33796478016. Its totient is φ = 28421923584.

The previous prime is 31053720623. The next prime is 31053720683. The reversal of 31053720667 is 76602735013.

It is not a de Polignac number, because 31053720667 - 2⁷ = 31053720539 is a prime.

It is a super-4 number, since 4×31053720667⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31053720967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25600153 + ... + 25601365.

It is an arithmetic number, because the mean of its divisors is an integer number (1408186584).

Almost surely, 2^31053720667 is an apocalyptic number.

31053720667 is a deficient number, since it is larger than the sum of its proper divisors (2742757349).

31053720667 is a wasteful number, since it uses less digits than its factorization.

31053720667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 40.

The spelling of 31053720667 in words is "thirty-one billion, fifty-three million, seven hundred twenty thousand, six hundred sixty-seven".