27877299979 has 4 divisors (see below), whose sum is σ = 27878095080. Its totient is φ = 27876504880.

The previous prime is 27877299959. The next prime is 27877299991. The reversal of 27877299979 is 97999277872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27877299979 - 2¹⁵ = 27877267211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27877299959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342409 + ... + 415930.

It is an arithmetic number, because the mean of its divisors is an integer number (6969523770).

Almost surely, 2^27877299979 is an apocalyptic number.

27877299979 is a deficient number, since it is larger than the sum of its proper divisors (795101).

27877299979 is an equidigital number, since it uses as much as digits as its factorization.

27877299979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795100.

The product of its digits is 504094752, while the sum is 76.

The spelling of 27877299979 in words is "twenty-seven billion, eight hundred seventy-seven million, two hundred ninety-nine thousand, nine hundred seventy-nine".