27940387885 has 12 divisors (see below), whose sum is σ = 34644923964. Its totient is φ = 21631264320.

The previous prime is 27940387877. The next prime is 27940387901. The reversal of 27940387885 is 58878304972.

It can be written as a sum of positive squares in 2 ways, for example, as 21938941924 + 6001445961 = 148118^2 + 77469^2 .

It is not a de Polignac number, because 27940387885 - 2³ = 27940387877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2902624 + ... + 2912233.

It is an arithmetic number, because the mean of its divisors is an integer number (2887076997).

Almost surely, 2^27940387885 is an apocalyptic number.

It is an amenable number.

27940387885 is a deficient number, since it is larger than the sum of its proper divisors (6704536079).

27940387885 is an equidigital number, since it uses as much as digits as its factorization.

27940387885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5814924 (or 5814893 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 27940387885 in words is "twenty-seven billion, nine hundred forty million, three hundred eighty-seven thousand, eight hundred eighty-five".