12617944355 has 4 divisors (see below), whose sum is σ = 15141533232. Its totient is φ = 10094355480.

The previous prime is 12617944349. The next prime is 12617944393. The reversal of 12617944355 is 55344971621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12617944355 - 2¹⁸ = 12617682211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261794431 + ... + 1261794440.

It is an arithmetic number, because the mean of its divisors is an integer number (3785383308).

Almost surely, 2^12617944355 is an apocalyptic number.

12617944355 is a deficient number, since it is larger than the sum of its proper divisors (2523588877).

12617944355 is an equidigital number, since it uses as much as digits as its factorization.

12617944355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523588876.

The product of its digits is 907200, while the sum is 47.

The spelling of 12617944355 in words is "twelve billion, six hundred seventeen million, nine hundred forty-four thousand, three hundred fifty-five".