642644228262 has 32 divisors (see below), whose sum is σ = 1320227251200. Its totient is φ = 208393375968.

The previous prime is 642644228249. The next prime is 642644228323. The reversal of 642644228262 is 262822446246.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1260939 + ... + 1695657.

It is an arithmetic number, because the mean of its divisors is an integer number (41257101600).

Almost surely, 2^642644228262 is an apocalyptic number.

642644228262 is an abundant number, since it is smaller than the sum of its proper divisors (677583022938).

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

642644228262 is a wasteful number, since it uses less digits than its factorization.

642644228262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441420.

The product of its digits is 3538944, while the sum is 48.

The spelling of 642644228262 in words is "six hundred forty-two billion, six hundred forty-four million, two hundred twenty-eight thousand, two hundred sixty-two".