642585004996 has 81 divisors (see below), whose sum is σ = 1253974748943. Its totient is φ = 287907684240.

The previous prime is 642585004973. The next prime is 642585005033. The reversal of 642585004996 is 699400585246.

The square root of 642585004996 is 801614.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642585004996.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1463746945 + ... + 1463747383.

Almost surely, 2^642585004996 is an apocalyptic number.

642585004996 is the 801614-th square number.

It is an amenable number.

642585004996 is a deficient number, since it is larger than the sum of its proper divisors (611389743947).

642585004996 is an equidigital number, since it uses as much as digits as its factorization.

642585004996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 642585004996 in words is "six hundred forty-two billion, five hundred eighty-five million, four thousand, nine hundred ninety-six".