642707107385 has 32 divisors (see below), whose sum is σ = 910408384512. Its totient is φ = 426239835840.

The previous prime is 642707107379. The next prime is 642707107411. The reversal of 642707107385 is 583701707246.

It is a happy number.

It is not a de Polignac number, because 642707107385 - 2⁴ = 642707107369 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 1631024 + ... + 1986366.

It is an arithmetic number, because the mean of its divisors is an integer number (28450262016).

Almost surely, 2^642707107385 is an apocalyptic number.

It is an amenable number.

642707107385 is a deficient number, since it is larger than the sum of its proper divisors (267701277127).

642707107385 is a wasteful number, since it uses less digits than its factorization.

642707107385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357053.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 642707107385 in words is "six hundred forty-two billion, seven hundred seven million, one hundred seven thousand, three hundred eighty-five".