12491172386 has 32 divisors (see below), whose sum is σ = 23374369152. Its totient is φ = 4863720960.

The previous prime is 12491172371. The next prime is 12491172389. The reversal of 12491172386 is 68327119421.

It is not an unprimeable number, because it can be changed into a prime (12491172389) 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, 237440 + ... + 285236.

It is an arithmetic number, because the mean of its divisors is an integer number (730449036).

Almost surely, 2^12491172386 is an apocalyptic number.

12491172386 is a deficient number, since it is larger than the sum of its proper divisors (10883196766).

12491172386 is a wasteful number, since it uses less digits than its factorization.

12491172386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49514.

The product of its digits is 145152, while the sum is 44.

The spelling of 12491172386 in words is "twelve billion, four hundred ninety-one million, one hundred seventy-two thousand, three hundred eighty-six".