642486374863 has 4 divisors (see below), whose sum is σ = 642488603760. Its totient is φ = 642484145968.

The previous prime is 642486374837. The next prime is 642486374909. The reversal of 642486374863 is 368473684246.

642486374863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642486374863 - 2²⁵ = 642452820431 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 (642486374263) 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, 604195 + ... + 1284532.

It is an arithmetic number, because the mean of its divisors is an integer number (160622150940).

Almost surely, 2^642486374863 is an apocalyptic number.

642486374863 is a deficient number, since it is larger than the sum of its proper divisors (2228897).

642486374863 is a wasteful number, since it uses less digits than its factorization.

642486374863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228896.

The product of its digits is 111476736, while the sum is 61.

The spelling of 642486374863 in words is "six hundred forty-two billion, four hundred eighty-six million, three hundred seventy-four thousand, eight hundred sixty-three".