642354225244 has 6 divisors (see below), whose sum is σ = 1124119894184. Its totient is φ = 321177112620.

The previous prime is 642354225221. The next prime is 642354225251. The reversal of 642354225244 is 442522453246.

It is a self number, because there is not a number n which added to its sum of digits gives 642354225244.

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 as a sum of consecutive naturals, namely, 80294278152 + ... + 80294278159.

Almost surely, 2^642354225244 is an apocalyptic number.

It is an amenable number.

642354225244 is a deficient number, since it is larger than the sum of its proper divisors (481765668940).

642354225244 is a wasteful number, since it uses less digits than its factorization.

642354225244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160588556315 (or 160588556313 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 43.

The spelling of 642354225244 in words is "six hundred forty-two billion, three hundred fifty-four million, two hundred twenty-five thousand, two hundred forty-four".