27887693979 has 48 divisors (see below), whose sum is σ = 40204523520. Its totient is φ = 17188354560.

The previous prime is 27887693963. The next prime is 27887693987. The reversal of 27887693979 is 97939678872.

It is not a de Polignac number, because 27887693979 - 2⁴ = 27887693963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27887693979.

It is not an unprimeable number, because it can be changed into a prime (27887693929) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13743537 + ... + 13745565.

It is an arithmetic number, because the mean of its divisors is an integer number (837594240).

Almost surely, 2^27887693979 is an apocalyptic number.

27887693979 is a deficient number, since it is larger than the sum of its proper divisors (12316829541).

27887693979 is a wasteful number, since it uses less digits than its factorization.

27887693979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340 (or 2323 counting only the distinct ones).

The product of its digits is 576108288, while the sum is 75.

The spelling of 27887693979 in words is "twenty-seven billion, eight hundred eighty-seven million, six hundred ninety-three thousand, nine hundred seventy-nine".