642057264056 has 16 divisors (see below), whose sum is σ = 1296461783400. Its totient is φ = 296334121824.

The previous prime is 642057263993. The next prime is 642057264061. The reversal of 642057264056 is 650462750246.

It is a super-2 number, since 2×642057264056² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642057264056.

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, 3086813666 + ... + 3086813873.

Almost surely, 2^642057264056 is an apocalyptic number.

It is an amenable number.

642057264056 is an abundant number, since it is smaller than the sum of its proper divisors (654404519344).

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

642057264056 is a wasteful number, since it uses less digits than its factorization.

642057264056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173627558 (or 6173627554 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 642057264056 in words is "six hundred forty-two billion, fifty-seven million, two hundred sixty-four thousand, fifty-six".