642257055332 has 24 divisors (see below), whose sum is σ = 1135787874816. Its totient is φ = 317747697408.

The previous prime is 642257055289. The next prime is 642257055353. The reversal of 642257055332 is 233550752246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597613 + ... + 1958795.

It is an arithmetic number, because the mean of its divisors is an integer number (47324494784).

Almost surely, 2^642257055332 is an apocalyptic number.

It is an amenable number.

642257055332 is a deficient number, since it is larger than the sum of its proper divisors (493530819484).

642257055332 is a wasteful number, since it uses less digits than its factorization.

642257055332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365867 (or 365865 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 44.

The spelling of 642257055332 in words is "six hundred forty-two billion, two hundred fifty-seven million, fifty-five thousand, three hundred thirty-two".