642612064460 has 12 divisors (see below), whose sum is σ = 1349485335408. Its totient is φ = 257044825776.

The previous prime is 642612064433. The next prime is 642612064487. The reversal of 642612064460 is 64460216246.

It is an interprime number because it is at equal distance from previous prime (642612064433) and next prime (642612064487).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16065301592 + ... + 16065301631.

It is an arithmetic number, because the mean of its divisors is an integer number (112457111284).

Almost surely, 2^642612064460 is an apocalyptic number.

It is an amenable number.

642612064460 is an abundant number, since it is smaller than the sum of its proper divisors (706873270948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642612064460 is a wasteful number, since it uses less digits than its factorization.

642612064460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32130603232 (or 32130603230 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 642612064460 in words is "six hundred forty-two billion, six hundred twelve million, sixty-four thousand, four hundred sixty".