642760942764 has 24 divisors (see below), whose sum is σ = 1540310008048. Its totient is φ = 208463008320.

The previous prime is 642760942709. The next prime is 642760942841. The reversal of 642760942764 is 467249067246.

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 7 ways as a sum of consecutive naturals, for example, 723829447 + ... + 723830334.

Almost surely, 2^642760942764 is an apocalyptic number.

It is an amenable number.

642760942764 is an abundant number, since it is smaller than the sum of its proper divisors (897549065284).

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

642760942764 is a wasteful number, since it uses less digits than its factorization.

642760942764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447659825 (or 1447659823 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 642760942764 in words is "six hundred forty-two billion, seven hundred sixty million, nine hundred forty-two thousand, seven hundred sixty-four".