642416152644 has 72 divisors (see below), whose sum is σ = 1860926016768. Its totient is φ = 183047316480.

The previous prime is 642416152621. The next prime is 642416152757. The reversal of 642416152644 is 446251614246.

642416152644 is a `hidden beast` number, since 6 + 4 + 2 + 4 + 1 + 615 + 26 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 642416152644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3380637 + ... + 3565604.

Almost surely, 2^642416152644 is an apocalyptic number.

It is an amenable number.

642416152644 is an abundant number, since it is smaller than the sum of its proper divisors (1218509864124).

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

642416152644 is a wasteful number, since it uses less digits than its factorization.

642416152644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946625 (or 6946620 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The spelling of 642416152644 in words is "six hundred forty-two billion, four hundred sixteen million, one hundred fifty-two thousand, six hundred forty-four".