641273644736 has 28 divisors (see below), whose sum is σ = 1306920025728. Its totient is φ = 311970961152.

The previous prime is 641273644703. The next prime is 641273644757. The reversal of 641273644736 is 637446372146.

It is a super-2 number, since 2×641273644736² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135401696 + ... + 135406431.

Almost surely, 2^641273644736 is an apocalyptic number.

It is an amenable number.

641273644736 is an abundant number, since it is smaller than the sum of its proper divisors (665646380992).

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

641273644736 is a wasteful number, since it uses less digits than its factorization.

641273644736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270808176 (or 270808166 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 53.

The spelling of 641273644736 in words is "six hundred forty-one billion, two hundred seventy-three million, six hundred forty-four thousand, seven hundred thirty-six".