27331781904 has 120 divisors (see below), whose sum is σ = 90238367232. Its totient is φ = 7557166080.

The previous prime is 27331781879. The next prime is 27331781923. The reversal of 27331781904 is 40918713372.

It is a self number, because there is not a number n which added to its sum of digits gives 27331781904.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 406089 + ... + 468584.

Almost surely, 2^27331781904 is an apocalyptic number.

27331781904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27331781904 is an abundant number, since it is smaller than the sum of its proper divisors (62906585328).

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

27331781904 is a wasteful number, since it uses less digits than its factorization.

27331781904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874725 (or 874716 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 27331781904 in words is "twenty-seven billion, three hundred thirty-one million, seven hundred eighty-one thousand, nine hundred four".