27879800680 has 16 divisors (see below), whose sum is σ = 62729551620. Its totient is φ = 11151920256.

The previous prime is 27879800677. The next prime is 27879800687. The reversal of 27879800680 is 8600897872.

It can be written as a sum of positive squares in 2 ways, for example, as 23313014596 + 4566786084 = 152686^2 + 67578^2 .

It is not an unprimeable number, because it can be changed into a prime (27879800687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348497469 + ... + 348497548.

Almost surely, 2^27879800680 is an apocalyptic number.

27879800680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27879800680 is an abundant number, since it is smaller than the sum of its proper divisors (34849750940).

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

27879800680 is a wasteful number, since it uses less digits than its factorization.

27879800680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696995028 (or 696995024 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 27879800680 in words is "twenty-seven billion, eight hundred seventy-nine million, eight hundred thousand, six hundred eighty".