642044546637 has 16 divisors (see below), whose sum is σ = 927566017728. Its totient is φ = 392680379520.

The previous prime is 642044546629. The next prime is 642044546659. The reversal of 642044546637 is 736645440246.

It is not a de Polignac number, because 642044546637 - 2³ = 642044546629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642044546637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642044546537) 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, 50492664 + ... + 50505377.

It is an arithmetic number, because the mean of its divisors is an integer number (57972876108).

Almost surely, 2^642044546637 is an apocalyptic number.

It is an amenable number.

642044546637 is a deficient number, since it is larger than the sum of its proper divisors (285521471091).

642044546637 is a wasteful number, since it uses less digits than its factorization.

642044546637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100998220.

The product of its (nonzero) digits is 11612160, while the sum is 51.

The spelling of 642044546637 in words is "six hundred forty-two billion, forty-four million, five hundred forty-six thousand, six hundred thirty-seven".