642743064320 has 72 divisors (see below), whose sum is σ = 1759509163104. Its totient is φ = 220369047552.

The previous prime is 642743064317. The next prime is 642743064331. The reversal of 642743064320 is 23460347246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35858399 + ... + 35876318.

Almost surely, 2^642743064320 is an apocalyptic number.

It is an amenable number.

642743064320 is an abundant number, since it is smaller than the sum of its proper divisors (1116766098784).

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

642743064320 is an equidigital number, since it uses as much as digits as its factorization.

642743064320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71734745 (or 71734731 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 41.

The spelling of 642743064320 in words is "six hundred forty-two billion, seven hundred forty-three million, sixty-four thousand, three hundred twenty".