31016929861 has 4 divisors (see below), whose sum is σ = 31024216800. Its totient is φ = 31009642924.

The previous prime is 31016929859. The next prime is 31016929871. The reversal of 31016929861 is 16892961013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31016929861 - 2¹ = 31016929859 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 (31016929871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3637081 + ... + 3645598.

It is an arithmetic number, because the mean of its divisors is an integer number (7756054200).

Almost surely, 2^31016929861 is an apocalyptic number.

It is an amenable number.

31016929861 is a deficient number, since it is larger than the sum of its proper divisors (7286939).

31016929861 is an equidigital number, since it uses as much as digits as its factorization.

31016929861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7286938.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 31016929861 in words is "thirty-one billion, sixteen million, nine hundred twenty-nine thousand, eight hundred sixty-one".