27297661560 has 64 divisors (see below), whose sum is σ = 88192450080. Its totient is φ = 6719424000.

The previous prime is 27297661553. The next prime is 27297661561. The reversal of 27297661560 is 6516679272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27297661561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8747691 + ... + 8750810.

Almost surely, 2^27297661560 is an apocalyptic number.

27297661560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27297661560 is an abundant number, since it is smaller than the sum of its proper divisors (60894788520).

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

27297661560 is a wasteful number, since it uses less digits than its factorization.

27297661560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17498528 (or 17498524 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 27297661560 in words is "twenty-seven billion, two hundred ninety-seven million, six hundred sixty-one thousand, five hundred sixty".