12647377920 has 176 divisors, whose sum is σ = 41848212960. Its totient is φ = 3256221696.

The previous prime is 12647377849. The next prime is 12647377921. The reversal of 12647377920 is 2977374621.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12647377920.

It is not an unprimeable number, because it can be changed into a prime (12647377921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431244 + ... + 459636.

Almost surely, 2^12647377920 is an apocalyptic number.

12647377920 is a gapful number since it is divisible by the number (10) 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 12647377920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20924106480).

12647377920 is an abundant number, since it is smaller than the sum of its proper divisors (29200835040).

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

12647377920 is a wasteful number, since it uses less digits than its factorization.

12647377920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28450 (or 28432 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 48.

The spelling of 12647377920 in words is "twelve billion, six hundred forty-seven million, three hundred seventy-seven thousand, nine hundred twenty".