27561976324 has 9 divisors (see below), whose sum is σ = 48234039637. Its totient is φ = 13780822144.

The previous prime is 27561976313. The next prime is 27561976357. The reversal of 27561976324 is 42367916572.

It is a happy number.

The square root of 27561976324 is 166018.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16878686724 + 10683289600 = 129918^2 + 103360^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 290532 + ... + 373540.

Almost surely, 2^27561976324 is an apocalyptic number.

27561976324 is the 166018-th square number.

It is an amenable number.

27561976324 is a deficient number, since it is larger than the sum of its proper divisors (20672063313).

27561976324 is an frugal number, since it uses more digits than its factorization.

27561976324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166022 (or 83011 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 52.

The spelling of 27561976324 in words is "twenty-seven billion, five hundred sixty-one million, nine hundred seventy-six thousand, three hundred twenty-four".