642723708992 has 28 divisors (see below), whose sum is σ = 1280254341696. Its totient is φ = 320139937920.

The previous prime is 642723708973. The next prime is 642723709049. The reversal of 642723708992 is 299807327246.

It is a happy number.

It is a super-2 number, since 2×642723708992² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19075484 + ... + 19109147.

Almost surely, 2^642723708992 is an apocalyptic number.

It is an amenable number.

642723708992 is a deficient number, since it is larger than the sum of its proper divisors (637530632704).

642723708992 is a wasteful number, since it uses less digits than its factorization.

642723708992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38184906 (or 38184896 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 642723708992 in words is "six hundred forty-two billion, seven hundred twenty-three million, seven hundred eight thousand, nine hundred ninety-two".