12461989739 has 4 divisors (see below), whose sum is σ = 12863989440. Its totient is φ = 12059990040.

The previous prime is 12461989679. The next prime is 12461989747. The reversal of 12461989739 is 93798916421.

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

It is a cyclic number.

It is not a de Polignac number, because 12461989739 - 2²⁴ = 12445212523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12461989759) 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, 200999804 + ... + 200999865.

It is an arithmetic number, because the mean of its divisors is an integer number (3215997360).

Almost surely, 2^12461989739 is an apocalyptic number.

12461989739 is a deficient number, since it is larger than the sum of its proper divisors (401999701).

12461989739 is an equidigital number, since it uses as much as digits as its factorization.

12461989739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401999700.

The product of its digits is 5878656, while the sum is 59.

The spelling of 12461989739 in words is "twelve billion, four hundred sixty-one million, nine hundred eighty-nine thousand, seven hundred thirty-nine".