27642477864 has 64 divisors (see below), whose sum is σ = 72800755200. Its totient is φ = 8722316736.

The previous prime is 27642477859. The next prime is 27642477893. The reversal of 27642477864 is 46877424672.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 570907 + ... + 617429.

It is an arithmetic number, because the mean of its divisors is an integer number (1137511800).

Almost surely, 2^27642477864 is an apocalyptic number.

27642477864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27642477864 is an abundant number, since it is smaller than the sum of its proper divisors (45158277336).

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

27642477864 is a wasteful number, since it uses less digits than its factorization.

27642477864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47854 (or 47850 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 57.

The spelling of 27642477864 in words is "twenty-seven billion, six hundred forty-two million, four hundred seventy-seven thousand, eight hundred sixty-four".