642332552565 has 32 divisors (see below), whose sum is σ = 1121252637312. Its totient is φ = 311408864000.

The previous prime is 642332552557. The next prime is 642332552591. The reversal of 642332552565 is 565255233246.

It is not a de Polignac number, because 642332552565 - 2³ = 642332552557 is a prime.

It is a super-2 number, since 2×642332552565² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1984855 + ... + 2285675.

It is an arithmetic number, because the mean of its divisors is an integer number (35039144916).

Almost surely, 2^642332552565 is an apocalyptic number.

It is an amenable number.

642332552565 is a deficient number, since it is larger than the sum of its proper divisors (478920084747).

642332552565 is a wasteful number, since it uses less digits than its factorization.

642332552565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313781.

The product of its digits is 6480000, while the sum is 48.

The spelling of 642332552565 in words is "six hundred forty-two billion, three hundred thirty-two million, five hundred fifty-two thousand, five hundred sixty-five".