27773144868 has 48 divisors (see below), whose sum is σ = 78418295424. Its totient is φ = 7468408320.

The previous prime is 27773144837. The next prime is 27773144887. The reversal of 27773144868 is 86844137772.

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, 9723063 + ... + 9725918.

It is an arithmetic number, because the mean of its divisors is an integer number (1633714488).

Almost surely, 2^27773144868 is an apocalyptic number.

27773144868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27773144868 is an abundant number, since it is smaller than the sum of its proper divisors (50645150556).

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

27773144868 is a wasteful number, since it uses less digits than its factorization.

27773144868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19449012 (or 19449010 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 57.

The spelling of 27773144868 in words is "twenty-seven billion, seven hundred seventy-three million, one hundred forty-four thousand, eight hundred sixty-eight".