642558614364 has 36 divisors (see below), whose sum is σ = 1640990193024. Its totient is φ = 211978098432.

The previous prime is 642558614287. The next prime is 642558614389. The reversal of 642558614364 is 463416855246.

642558614364 is a `hidden beast` number, since 6 + 4 + 25 + 586 + 1 + 4 + 36 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 642558614364.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92000892 + ... + 92007875.

Almost surely, 2^642558614364 is an apocalyptic number.

It is an amenable number.

642558614364 is an abundant number, since it is smaller than the sum of its proper divisors (998431578660).

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

642558614364 is a wasteful number, since it uses less digits than its factorization.

642558614364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184008874 (or 184008869 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

The spelling of 642558614364 in words is "six hundred forty-two billion, five hundred fifty-eight million, six hundred fourteen thousand, three hundred sixty-four".