27992870905 has 48 divisors (see below), whose sum is σ = 38079002880. Its totient is φ = 19692730368.

The previous prime is 27992870891. The next prime is 27992870951. The reversal of 27992870905 is 50907829972.

It is not a de Polignac number, because 27992870905 - 2⁷ = 27992870777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27992870905.

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 in 47 ways as a sum of consecutive naturals, for example, 1997232 + ... + 2011198.

It is an arithmetic number, because the mean of its divisors is an integer number (793312560).

Almost surely, 2^27992870905 is an apocalyptic number.

It is an amenable number.

27992870905 is a deficient number, since it is larger than the sum of its proper divisors (10086131975).

27992870905 is a wasteful number, since it uses less digits than its factorization.

27992870905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14098 (or 14081 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 27992870905 in words is "twenty-seven billion, nine hundred ninety-two million, eight hundred seventy thousand, nine hundred five".