641545565125 has 16 divisors (see below), whose sum is σ = 801023159664. Its totient is φ = 512996520000.

The previous prime is 641545565119. The next prime is 641545565147. The reversal of 641545565125 is 521565545146.

It can be written as a sum of positive squares in 8 ways, for example, as 415466689 + 641130098436 = 20383^2 + 800706^2 .

It is not a de Polignac number, because 641545565125 - 2⁵ = 641545565093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930966 + ... + 1466215.

It is an arithmetic number, because the mean of its divisors is an integer number (50063947479).

Almost surely, 2^641545565125 is an apocalyptic number.

It is an amenable number.

641545565125 is a deficient number, since it is larger than the sum of its proper divisors (159477594539).

641545565125 is a wasteful number, since it uses less digits than its factorization.

641545565125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399337 (or 2399327 counting only the distinct ones).

The product of its digits is 3600000, while the sum is 49.

The spelling of 641545565125 in words is "six hundred forty-one billion, five hundred forty-five million, five hundred sixty-five thousand, one hundred twenty-five".