12617434855 has 4 divisors (see below), whose sum is σ = 15140921832. Its totient is φ = 10093947880.

The previous prime is 12617434807. The next prime is 12617434883. The reversal of 12617434855 is 55843471621.

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

It is not a de Polignac number, because 12617434855 - 2⁷ = 12617434727 is a prime.

It is a Duffinian number.

It is a congruent 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, 1261743481 + ... + 1261743490.

It is an arithmetic number, because the mean of its divisors is an integer number (3785230458).

Almost surely, 2^12617434855 is an apocalyptic number.

12617434855 is a deficient number, since it is larger than the sum of its proper divisors (2523486977).

12617434855 is an equidigital number, since it uses as much as digits as its factorization.

12617434855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523486976.

The product of its digits is 806400, while the sum is 46.

The spelling of 12617434855 in words is "twelve billion, six hundred seventeen million, four hundred thirty-four thousand, eight hundred fifty-five".