27881791344 has 120 divisors (see below), whose sum is σ = 87870042624. Its totient is φ = 8176464000.

The previous prime is 27881791339. The next prime is 27881791381. The reversal of 27881791344 is 44319718872.

It is a congruent number.

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, 234802 + ... + 333009.

Almost surely, 2^27881791344 is an apocalyptic number.

27881791344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27881791344 is an abundant number, since it is smaller than the sum of its proper divisors (59988251280).

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

27881791344 is a wasteful number, since it uses less digits than its factorization.

27881791344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567867 (or 567858 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 27881791344 in words is "twenty-seven billion, eight hundred eighty-one million, seven hundred ninety-one thousand, three hundred forty-four".