27851986560 has 64 divisors (see below), whose sum is σ = 88778213280. Its totient is φ = 7427195904.

The previous prime is 27851986553. The next prime is 27851986609. The reversal of 27851986560 is 6568915872.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 27851986560.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7251202 + ... + 7255041.

Almost surely, 2^27851986560 is an apocalyptic number.

27851986560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27851986560 is an abundant number, since it is smaller than the sum of its proper divisors (60926226720).

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

27851986560 is a wasteful number, since it uses less digits than its factorization.

27851986560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14506265 (or 14506253 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 27851986560 in words is "twenty-seven billion, eight hundred fifty-one million, nine hundred eighty-six thousand, five hundred sixty".