641740755872 has 24 divisors (see below), whose sum is σ = 1263574412100. Its totient is φ = 320832968704.

The previous prime is 641740755869. The next prime is 641740755889. The reversal of 641740755872 is 278557047146.

641740755872 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 2 ways, for example, as 612907357456 + 28833398416 = 782884^2 + 169804^2 .

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, 889247 + ... + 1440222.

Almost surely, 2^641740755872 is an apocalyptic number.

It is an amenable number.

641740755872 is a deficient number, since it is larger than the sum of its proper divisors (621833656228).

641740755872 is a wasteful number, since it uses less digits than its factorization.

641740755872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338088 (or 2338080 counting only the distinct ones).

The product of its (nonzero) digits is 13171200, while the sum is 56.

The spelling of 641740755872 in words is "six hundred forty-one billion, seven hundred forty million, seven hundred fifty-five thousand, eight hundred seventy-two".