10644636925 has 54 divisors (see below), whose sum is σ = 14610300558. Its totient is φ = 7647759360.

The previous prime is 10644636917. The next prime is 10644636941. The reversal of 10644636925 is 52963644601.

It can be written as a sum of positive squares in 9 ways, for example, as 5274971641 + 5369665284 = 72629^2 + 73278^2 .

It is not a de Polignac number, because 10644636925 - 2³ = 10644636917 is a prime.

It is a super-2 number, since 2×10644636925² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 109738477 + ... + 109738573.

Almost surely, 2^10644636925 is an apocalyptic number.

It is an amenable number.

10644636925 is a deficient number, since it is larger than the sum of its proper divisors (3965663633).

10644636925 is an frugal number, since it uses more digits than its factorization.

10644636925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 10644636925 in words is "ten billion, six hundred forty-four million, six hundred thirty-six thousand, nine hundred twenty-five".