31616044865 has 32 divisors (see below), whose sum is σ = 42035106816. Its totient is φ = 22721402880.

The previous prime is 31616044829. The next prime is 31616044891. The reversal of 31616044865 is 56844061613.

It is not a de Polignac number, because 31616044865 - 2⁸ = 31616044609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110174 + ... + 274536.

It is an arithmetic number, because the mean of its divisors is an integer number (1313597088).

Almost surely, 2^31616044865 is an apocalyptic number.

It is an amenable number.

31616044865 is a deficient number, since it is larger than the sum of its proper divisors (10419061951).

31616044865 is a wasteful number, since it uses less digits than its factorization.

31616044865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164489.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 31616044865 in words is "thirty-one billion, six hundred sixteen million, forty-four thousand, eight hundred sixty-five".