30961808065 has 16 divisors (see below), whose sum is σ = 37617370560. Its totient is φ = 24462129600.

The previous prime is 30961808057. The next prime is 30961808069. The reversal of 30961808065 is 56080816903.

It is not a de Polignac number, because 30961808065 - 2³ = 30961808057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30961808069) 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, 74790 + ... + 259840.

It is an arithmetic number, because the mean of its divisors is an integer number (2351085660).

Almost surely, 2^30961808065 is an apocalyptic number.

It is an amenable number.

30961808065 is a deficient number, since it is larger than the sum of its proper divisors (6655562495).

30961808065 is a wasteful number, since it uses less digits than its factorization.

30961808065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185472.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 30961808065 in words is "thirty billion, nine hundred sixty-one million, eight hundred eight thousand, sixty-five".