12461989736 has 64 divisors (see below), whose sum is σ = 27764640000. Its totient is φ = 5130639360.

The previous prime is 12461989679. The next prime is 12461989747. The reversal of 12461989736 is 63798916421.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303896 + ... + 342456.

It is an arithmetic number, because the mean of its divisors is an integer number (433822500).

Almost surely, 2^12461989736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12461989736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13882320000).

12461989736 is an abundant number, since it is smaller than the sum of its proper divisors (15302650264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12461989736 is a wasteful number, since it uses less digits than its factorization.

12461989736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38802 (or 38798 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The spelling of 12461989736 in words is "twelve billion, four hundred sixty-one million, nine hundred eighty-nine thousand, seven hundred thirty-six".