12347845257 has 16 divisors (see below), whose sum is σ = 17966092032. Its totient is φ = 7481213520.

The previous prime is 12347845247. The next prime is 12347845277. The reversal of 12347845257 is 75254874321.

It is a happy number.

It is not a de Polignac number, because 12347845257 - 2¹⁸ = 12347583113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12347845207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52558 + ... + 165704.

It is an arithmetic number, because the mean of its divisors is an integer number (1122880752).

Almost surely, 2^12347845257 is an apocalyptic number.

It is an amenable number.

12347845257 is a deficient number, since it is larger than the sum of its proper divisors (5618246775).

12347845257 is a wasteful number, since it uses less digits than its factorization.

12347845257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116468.

The product of its digits is 1881600, while the sum is 48.

The spelling of 12347845257 in words is "twelve billion, three hundred forty-seven million, eight hundred forty-five thousand, two hundred fifty-seven".