12123765879 has 24 divisors (see below), whose sum is σ = 17071189632. Its totient is φ = 7652359440.

The previous prime is 12123765859. The next prime is 12123765881. The reversal of 12123765879 is 97856732121.

It is not a de Polignac number, because 12123765879 - 2¹⁶ = 12123700343 is a prime.

It is a super-3 number, since 3×12123765879³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123765809) 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, 2738862 + ... + 2743284.

It is an arithmetic number, because the mean of its divisors is an integer number (711299568).

Almost surely, 2^12123765879 is an apocalyptic number.

12123765879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12123765879 is a deficient number, since it is larger than the sum of its proper divisors (4947423753).

12123765879 is a wasteful number, since it uses less digits than its factorization.

12123765879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995 (or 6976 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The spelling of 12123765879 in words is "twelve billion, one hundred twenty-three million, seven hundred sixty-five thousand, eight hundred seventy-nine".