642270810724 has 27 divisors (see below), whose sum is σ = 1142875763211. Its totient is φ = 315822805440.

The previous prime is 642270810703. The next prime is 642270810763. The reversal of 642270810724 is 427018072246.

The square root of 642270810724 is 801418.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 12660300324 + 629610510400 = 112518^2 + 793480^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 97769712 + ... + 97776280.

Almost surely, 2^642270810724 is an apocalyptic number.

642270810724 is the 801418-th square number.

It is an amenable number.

642270810724 is a deficient number, since it is larger than the sum of its proper divisors (500604952487).

642270810724 is an frugal number, since it uses more digits than its factorization.

642270810724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13264 (or 6632 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 642270810724 in words is "six hundred forty-two billion, two hundred seventy million, eight hundred ten thousand, seven hundred twenty-four".