642431544054 has 16 divisors (see below), whose sum is σ = 1296871155648. Its totient is φ = 212142503432.

The previous prime is 642431544047. The next prime is 642431544061. The reversal of 642431544054 is 450445134246.

It is an interprime number because it is at equal distance from previous prime (642431544047) and next prime (642431544061).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 642431543997 and 642431544015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500335452 + ... + 500336735.

It is an arithmetic number, because the mean of its divisors is an integer number (81054447228).

Almost surely, 2^642431544054 is an apocalyptic number.

642431544054 is an abundant number, since it is smaller than the sum of its proper divisors (654439611594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642431544054 is a wasteful number, since it uses less digits than its factorization.

642431544054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000672299.

The product of its (nonzero) digits is 921600, while the sum is 42.

The spelling of 642431544054 in words is "six hundred forty-two billion, four hundred thirty-one million, five hundred forty-four thousand, fifty-four".