642005564038 has 16 divisors (see below), whose sum is σ = 966200930640. Its totient is φ = 319939462656.

The previous prime is 642005564021. The next prime is 642005564041. The reversal of 642005564038 is 830465500246.

642005564038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642005564038² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642005563985 and 642005564003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257181 + ... + 1692487.

It is an arithmetic number, because the mean of its divisors is an integer number (60387558165).

Almost surely, 2^642005564038 is an apocalyptic number.

642005564038 is a deficient number, since it is larger than the sum of its proper divisors (324195366602).

642005564038 is a wasteful number, since it uses less digits than its factorization.

642005564038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437751.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 642005564038 in words is "six hundred forty-two billion, five million, five hundred sixty-four thousand, thirty-eight".