12258977279 has 4 divisors (see below), whose sum is σ = 12259395240. Its totient is φ = 12258559320.

The previous prime is 12258977261. The next prime is 12258977323. The reversal of 12258977279 is 97277985221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97277985221 = 19 ⋅5119893959.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12258977279 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 (12258977879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161369 + ... + 224850.

It is an arithmetic number, because the mean of its divisors is an integer number (3064848810).

Almost surely, 2^12258977279 is an apocalyptic number.

12258977279 is a deficient number, since it is larger than the sum of its proper divisors (417961).

12258977279 is an equidigital number, since it uses as much as digits as its factorization.

12258977279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417960.

The product of its digits is 8890560, while the sum is 59.

The spelling of 12258977279 in words is "twelve billion, two hundred fifty-eight million, nine hundred seventy-seven thousand, two hundred seventy-nine".