27766388904 has 64 divisors (see below), whose sum is σ = 71624044800. Its totient is φ = 8965115904.

The previous prime is 27766388887. The next prime is 27766388927. The reversal of 27766388904 is 40988366772.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17469 + ... + 236300.

It is an arithmetic number, because the mean of its divisors is an integer number (1119125700).

Almost surely, 2^27766388904 is an apocalyptic number.

27766388904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27766388904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35812022400).

27766388904 is an abundant number, since it is smaller than the sum of its proper divisors (43857655896).

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

27766388904 is a wasteful number, since it uses less digits than its factorization.

27766388904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253922 (or 253918 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 27766388904 in words is "twenty-seven billion, seven hundred sixty-six million, three hundred eighty-eight thousand, nine hundred four".