27761560656 has 20 divisors (see below), whose sum is σ = 71717365152. Its totient is φ = 9253853536.

The previous prime is 27761560633. The next prime is 27761560663. The reversal of 27761560656 is 65606516772.

It is a junction number, because it is equal to n+sod(n) for n = 27761560599 and 27761560608.

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 3 ways as a sum of consecutive naturals, for example, 289182876 + ... + 289182971.

Almost surely, 2^27761560656 is an apocalyptic number.

It is an amenable number.

27761560656 is an abundant number, since it is smaller than the sum of its proper divisors (43955804496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27761560656 is a wasteful number, since it uses less digits than its factorization.

27761560656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578365858 (or 578365852 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 27761560656 in words is "twenty-seven billion, seven hundred sixty-one million, five hundred sixty thousand, six hundred fifty-six".