27900256768 has 40 divisors (see below), whose sum is σ = 55895856588. Its totient is φ = 13912633344.

The previous prime is 27900256603. The next prime is 27900256771. The reversal of 27900256768 is 86765200972.

It can be written as a sum of positive squares in 2 ways, for example, as 24052287744 + 3847969024 = 155088^2 + 62032^2 .

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, 117930 + ... + 264022.

Almost surely, 2^27900256768 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 27900256768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27947928294).

27900256768 is an abundant number, since it is smaller than the sum of its proper divisors (27995599820).

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

27900256768 is an equidigital number, since it uses as much as digits as its factorization.

27900256768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146484 (or 146468 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 27900256768 in words is "twenty-seven billion, nine hundred million, two hundred fifty-six thousand, seven hundred sixty-eight".