12636452920 has 256 divisors, whose sum is σ = 37760567040. Its totient is φ = 3692003328.

The previous prime is 12636452909. The next prime is 12636452951. The reversal of 12636452920 is 2925463621.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3277714 + ... + 3281566.

It is an arithmetic number, because the mean of its divisors is an integer number (147502215).

Almost surely, 2^12636452920 is an apocalyptic number.

12636452920 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 12636452920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18880283520).

12636452920 is an abundant number, since it is smaller than the sum of its proper divisors (25124114120).

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

12636452920 is a wasteful number, since it uses less digits than its factorization.

12636452920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 12636452920 in words is "twelve billion, six hundred thirty-six million, four hundred fifty-two thousand, nine hundred twenty".