642255501365205 has 96 divisors (see below), whose sum is σ = 1292545984976640. Its totient is φ = 266574792407040.

The previous prime is 642255501365197. The next prime is 642255501365287. The reversal of 642255501365205 is 502563105552246.

It is not a de Polignac number, because 642255501365205 - 2³ = 642255501365197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 295586440 + ... + 297751329.

It is an arithmetic number, because the mean of its divisors is an integer number (13464020676840).

Almost surely, 2^{642255501365205} is an apocalyptic number.

642255501365205 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

642255501365205 is an abundant number, since it is smaller than the sum of its proper divisors (650290483611435).

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

642255501365205 is a wasteful number, since it uses less digits than its factorization.

642255501365205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593337871 (or 593337858 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 51.

The spelling of 642255501365205 in words is "six hundred forty-two trillion, two hundred fifty-five billion, five hundred one million, three hundred sixty-five thousand, two hundred five".