642255608097 has 12 divisors (see below), whose sum is σ = 927763492864. Its totient is φ = 428142275640.

The previous prime is 642255608063. The next prime is 642255608129. The reversal of 642255608097 is 790806552246.

642255608097 is a `hidden beast` number, since 6 + 4 + 2 + 2 + 556 + 0 + 80 + 9 + 7 = 666.

It is not a de Polignac number, because 642255608097 - 2⁷ = 642255607969 is a prime.

It is a super-2 number, since 2×642255608097² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642255608297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2199073 + ... + 2473950.

Almost surely, 2^642255608097 is an apocalyptic number.

It is an amenable number.

642255608097 is a deficient number, since it is larger than the sum of its proper divisors (285507884767).

642255608097 is a wasteful number, since it uses less digits than its factorization.

642255608097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688300 (or 4688297 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 642255608097 in words is "six hundred forty-two billion, two hundred fifty-five million, six hundred eight thousand, ninety-seven".