642842046623 has 16 divisors (see below), whose sum is σ = 766747399680. Its totient is φ = 526962407136.

The previous prime is 642842046547. The next prime is 642842046659. The reversal of 642842046623 is 326640248246.

It is a cyclic number.

It is not a de Polignac number, because 642842046623 - 2¹² = 642842042527 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 (642842046523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639536 + ... + 1301802.

It is an arithmetic number, because the mean of its divisors is an integer number (47921712480).

Almost surely, 2^642842046623 is an apocalyptic number.

642842046623 is a deficient number, since it is larger than the sum of its proper divisors (123905353057).

642842046623 is a wasteful number, since it uses less digits than its factorization.

642842046623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668326.

The product of its (nonzero) digits is 2654208, while the sum is 47.

The spelling of 642842046623 in words is "six hundred forty-two billion, eight hundred forty-two million, forty-six thousand, six hundred twenty-three".