12186990279 has 24 divisors (see below), whose sum is σ = 18546719360. Its totient is φ = 7690071312.

The previous prime is 12186990251. The next prime is 12186990301. The reversal of 12186990279 is 97209968121.

It is not a de Polignac number, because 12186990279 - 2¹⁵ = 12186957511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12186990779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160302 + ... + 223764.

Almost surely, 2^12186990279 is an apocalyptic number.

12186990279 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12186990279 is a deficient number, since it is larger than the sum of its proper divisors (6359729081).

12186990279 is a wasteful number, since it uses less digits than its factorization.

12186990279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64611 (or 64608 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 12186990279 in words is "twelve billion, one hundred eighty-six million, nine hundred ninety thousand, two hundred seventy-nine".