12491674989 has 4 divisors (see below), whose sum is σ = 16655566656. Its totient is φ = 8327783324.

The previous prime is 12491674981. The next prime is 12491674991. The reversal of 12491674989 is 98947619421.

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 12491674989 - 2³ = 12491674981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491674981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081945829 + ... + 2081945834.

It is an arithmetic number, because the mean of its divisors is an integer number (4163891664).

Almost surely, 2^12491674989 is an apocalyptic number.

It is an amenable number.

12491674989 is a deficient number, since it is larger than the sum of its proper divisors (4163891667).

12491674989 is an equidigital number, since it uses as much as digits as its factorization.

12491674989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163891666.

The product of its digits is 7838208, while the sum is 60.

The spelling of 12491674989 in words is "twelve billion, four hundred ninety-one million, six hundred seventy-four thousand, nine hundred eighty-nine".