642304868315 has 32 divisors (see below), whose sum is σ = 915610348800. Its totient is φ = 427284789120.

The previous prime is 642304868273. The next prime is 642304868347. The reversal of 642304868315 is 513868403246.

It is a happy number.

It is not a de Polignac number, because 642304868315 - 2⁶ = 642304868251 is a prime.

It is a super-2 number, since 2×642304868315² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10567037 + ... + 10627646.

It is an arithmetic number, because the mean of its divisors is an integer number (28612823400).

Almost surely, 2^642304868315 is an apocalyptic number.

642304868315 is a deficient number, since it is larger than the sum of its proper divisors (273305480485).

642304868315 is a wasteful number, since it uses less digits than its factorization.

642304868315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21194747.

The product of its (nonzero) digits is 3317760, while the sum is 50.

The spelling of 642304868315 in words is "six hundred forty-two billion, three hundred four million, eight hundred sixty-eight thousand, three hundred fifteen".