27777668398 has 16 divisors (see below), whose sum is σ = 44310138480. Its totient is φ = 13014758016.

The previous prime is 27777668363. The next prime is 27777668411. The reversal of 27777668398 is 89386677772.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776036 + ... + 1791607.

It is an arithmetic number, because the mean of its divisors is an integer number (2769383655).

Almost surely, 2^27777668398 is an apocalyptic number.

27777668398 is a deficient number, since it is larger than the sum of its proper divisors (16532470082).

27777668398 is a wasteful number, since it uses less digits than its factorization.

27777668398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567891.

The product of its digits is 298722816, while the sum is 70.

The spelling of 27777668398 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred sixty-eight thousand, three hundred ninety-eight".