12501636720 has 160 divisors (see below), whose sum is σ = 40850956800. Its totient is φ = 3153964032.

The previous prime is 12501636713. The next prime is 12501636743. The reversal of 12501636720 is 2763610521.

It is a congruent number.

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, 4481086 + ... + 4483874.

It is an arithmetic number, because the mean of its divisors is an integer number (255318480).

Almost surely, 2^12501636720 is an apocalyptic number.

12501636720 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 12501636720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20425478400).

12501636720 is an abundant number, since it is smaller than the sum of its proper divisors (28349320080).

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

12501636720 is a wasteful number, since it uses less digits than its factorization.

12501636720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807 (or 3801 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 12501636720 in words is "twelve billion, five hundred one million, six hundred thirty-six thousand, seven hundred twenty".