12961890279 has 24 divisors (see below), whose sum is σ = 20181586880. Its totient is φ = 7969171392.

The previous prime is 12961890239. The next prime is 12961890311. The reversal of 12961890279 is 97209816921.

12961890279 is a `hidden beast` number, since 1 + 296 + 1 + 89 + 0 + 279 = 666.

It is not a de Polignac number, because 12961890279 - 2¹⁵ = 12961857511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961890239) 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, 77202 + ... + 178560.

Almost surely, 2^12961890279 is an apocalyptic number.

12961890279 is a deficient number, since it is larger than the sum of its proper divisors (7219696601).

12961890279 is a wasteful number, since it uses less digits than its factorization.

12961890279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102471 (or 102468 counting only the distinct ones).

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

The spelling of 12961890279 in words is "twelve billion, nine hundred sixty-one million, eight hundred ninety thousand, two hundred seventy-nine".