12649728784 has 160 divisors (see below), whose sum is σ = 32490491904. Its totient is φ = 4624688640.

The previous prime is 12649728779. The next prime is 12649728799. The reversal of 12649728784 is 48782794621.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1497597 + ... + 1506019.

Almost surely, 2^12649728784 is an apocalyptic number.

12649728784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12649728784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16245245952).

12649728784 is an abundant number, since it is smaller than the sum of its proper divisors (19840763120).

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

12649728784 is a wasteful number, since it uses less digits than its factorization.

12649728784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8525 (or 8519 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The spelling of 12649728784 in words is "twelve billion, six hundred forty-nine million, seven hundred twenty-eight thousand, seven hundred eighty-four".