642728011724570 has 16 divisors (see below), whose sum is σ = 1175876165713608. Its totient is φ = 252876594776640.

The previous prime is 642728011724569. The next prime is 642728011724641. The reversal of 642728011724570 is 75427110827246.

642728011724570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 126342972777121 + 516385038947449 = 11240239^2 + 22724107^2 .

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, 526826238509 + ... + 526826239728.

Almost surely, 2^{642728011724570} is an apocalyptic number.

642728011724570 is a deficient number, since it is larger than the sum of its proper divisors (533148153989038).

642728011724570 is a wasteful number, since it uses less digits than its factorization.

642728011724570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053652478305.

The product of its (nonzero) digits is 10536960, while the sum is 56.

The spelling of 642728011724570 in words is "six hundred forty-two trillion, seven hundred twenty-eight billion, eleven million, seven hundred twenty-four thousand, five hundred seventy".