12499491957 has 4 divisors (see below), whose sum is σ = 16665989280. Its totient is φ = 8332994636.

The previous prime is 12499491931. The next prime is 12499492001. The reversal of 12499491957 is 75919499421.

12499491957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12499491957 - 2¹⁰ = 12499490933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12499491957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499491457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083248657 + ... + 2083248662.

It is an arithmetic number, because the mean of its divisors is an integer number (4166497320).

Almost surely, 2^12499491957 is an apocalyptic number.

It is an amenable number.

12499491957 is a deficient number, since it is larger than the sum of its proper divisors (4166497323).

12499491957 is an equidigital number, since it uses as much as digits as its factorization.

12499491957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166497322.

The product of its digits is 7348320, while the sum is 60.

The spelling of 12499491957 in words is "twelve billion, four hundred ninety-nine million, four hundred ninety-one thousand, nine hundred fifty-seven".