642864465007 has 4 divisors (see below), whose sum is σ = 643057578720. Its totient is φ = 642671351296.

The previous prime is 642864464897. The next prime is 642864465031. The reversal of 642864465007 is 700564468246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642864465007 - 2²³ = 642856076399 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 (642864465907) 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, 96551863 + ... + 96558520.

It is an arithmetic number, because the mean of its divisors is an integer number (160764394680).

Almost surely, 2^642864465007 is an apocalyptic number.

642864465007 is a deficient number, since it is larger than the sum of its proper divisors (193113713).

642864465007 is a wasteful number, since it uses less digits than its factorization.

642864465007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193113712.

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 642864465007 in words is "six hundred forty-two billion, eight hundred sixty-four million, four hundred sixty-five thousand, seven".