27568569640 has 16 divisors (see below), whose sum is σ = 62029281780. Its totient is φ = 11027427840.

The previous prime is 27568569629. The next prime is 27568569653. The reversal of 27568569640 is 4696586572.

It can be written as a sum of positive squares in 2 ways, for example, as 24512912356 + 3055657284 = 156566^2 + 55278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344607081 + ... + 344607160.

Almost surely, 2^27568569640 is an apocalyptic number.

27568569640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27568569640 is an abundant number, since it is smaller than the sum of its proper divisors (34460712140).

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

27568569640 is a wasteful number, since it uses less digits than its factorization.

27568569640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689214252 (or 689214248 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 27568569640 in words is "twenty-seven billion, five hundred sixty-eight million, five hundred sixty-nine thousand, six hundred forty".