642565080565245 has 48 divisors (see below), whose sum is σ = 1137488658958080. Its totient is φ = 335406392802432.

The previous prime is 642565080565171. The next prime is 642565080565283. The reversal of 642565080565245 is 542565080565246.

642565080565245 is a `hidden beast` number, since 6 + 4 + 2 + 5 + 6 + 50 + 8 + 0 + 56 + 524 + 5 = 666.

It is not a de Polignac number, because 642565080565245 - 2⁸ = 642565080564989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209957502 + ... + 212995968.

It is an arithmetic number, because the mean of its divisors is an integer number (23697680394960).

Almost surely, 2^{642565080565245} is an apocalyptic number.

It is an amenable number.

642565080565245 is a deficient number, since it is larger than the sum of its proper divisors (494923578392835).

642565080565245 is a wasteful number, since it uses less digits than its factorization.

642565080565245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138514 (or 3138511 counting only the distinct ones).

The product of its (nonzero) digits is 345600000, while the sum is 63.

Subtracting from 642565080565245 its reverse (542565080565246), we obtain a palindrome (99999999999999).

The spelling of 642565080565245 in words is "six hundred forty-two trillion, five hundred sixty-five billion, eighty million, five hundred sixty-five thousand, two hundred forty-five".