642442724572 has 12 divisors (see below), whose sum is σ = 1226481565176. Its totient is φ = 292019420240.

The previous prime is 642442724557. The next prime is 642442724593. The reversal of 642442724572 is 275427244246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7300485463 + ... + 7300485550.

It is an arithmetic number, because the mean of its divisors is an integer number (102206797098).

Almost surely, 2^642442724572 is an apocalyptic number.

It is an amenable number.

642442724572 is a deficient number, since it is larger than the sum of its proper divisors (584038840604).

642442724572 is a wasteful number, since it uses less digits than its factorization.

642442724572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14600971028 (or 14600971026 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 49.

The spelling of 642442724572 in words is "six hundred forty-two billion, four hundred forty-two million, seven hundred twenty-four thousand, five hundred seventy-two".