27251617968 has 140 divisors (see below), whose sum is σ = 79480572888. Its totient is φ = 9047531520.

The previous prime is 27251617909. The next prime is 27251617979. The reversal of 27251617968 is 86971615272.

27251617968 is a `hidden beast` number, since 27 + 2 + 516 + 17 + 96 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2993103 + ... + 3002193.

Almost surely, 2^27251617968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27251617968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39740286444).

27251617968 is an abundant number, since it is smaller than the sum of its proper divisors (52228954920).

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

27251617968 is an equidigital number, since it uses as much as digits as its factorization.

27251617968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9374 (or 9353 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 27251617968 in words is "twenty-seven billion, two hundred fifty-one million, six hundred seventeen thousand, nine hundred sixty-eight".