27657877868 has 6 divisors (see below), whose sum is σ = 48401286276. Its totient is φ = 13828938932.

The previous prime is 27657877837. The next prime is 27657877943. The reversal of 27657877868 is 86877875672.

It is a super-2 number, since 2×27657877868² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3457234730 + ... + 3457234737.

It is an arithmetic number, because the mean of its divisors is an integer number (8066881046).

Almost surely, 2^27657877868 is an apocalyptic number.

It is an amenable number.

27657877868 is a deficient number, since it is larger than the sum of its proper divisors (20743408408).

27657877868 is a wasteful number, since it uses less digits than its factorization.

27657877868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6914469471 (or 6914469469 counting only the distinct ones).

The product of its digits is 442552320, while the sum is 71.

The spelling of 27657877868 in words is "twenty-seven billion, six hundred fifty-seven million, eight hundred seventy-seven thousand, eight hundred sixty-eight".