12644769072 has 160 divisors (see below), whose sum is σ = 35847705600. Its totient is φ = 3817322496.

The previous prime is 12644769061. The next prime is 12644769083. The reversal of 12644769072 is 27096744621.

It is an interprime number because it is at equal distance from previous prime (12644769061) and next prime (12644769083).

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

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, 8823268 + ... + 8824700.

It is an arithmetic number, because the mean of its divisors is an integer number (224048160).

Almost surely, 2^12644769072 is an apocalyptic number.

12644769072 is a gapful number since it is divisible by the number (12) 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 12644769072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17923852800).

12644769072 is an abundant number, since it is smaller than the sum of its proper divisors (23202936528).

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

12644769072 is a wasteful number, since it uses less digits than its factorization.

12644769072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 12644769072 in words is "twelve billion, six hundred forty-four million, seven hundred sixty-nine thousand, seventy-two".