27561976325 has 96 divisors (see below), whose sum is σ = 40155992352. Its totient is φ = 18579456000.

The previous prime is 27561976313. The next prime is 27561976357. The reversal of 27561976325 is 52367916572.

It is a happy number.

It is a Cunningham number, because it is equal to 166018²+1.

It can be written as a sum of positive squares in 48 ways, for example, as 26353301569 + 1208674756 = 162337^2 + 34766^2 .

It is not a de Polignac number, because 27561976325 - 2²⁰ = 27560927749 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 95 ways as a sum of consecutive naturals, for example, 63653309 + ... + 63653741.

It is an arithmetic number, because the mean of its divisors is an integer number (418291587).

Almost surely, 2^27561976325 is an apocalyptic number.

27561976325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27561976325 is a deficient number, since it is larger than the sum of its proper divisors (12594016027).

27561976325 is a wasteful number, since it uses less digits than its factorization.

27561976325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 790 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 53.

The spelling of 27561976325 in words is "twenty-seven billion, five hundred sixty-one million, nine hundred seventy-six thousand, three hundred twenty-five".