12656286720 has 1408 divisors, whose sum is σ = 59425228800. Its totient is φ = 2477260800.

The previous prime is 12656286653. The next prime is 12656286757. The reversal of 12656286720 is 2768265621.

12656286720 is a `hidden beast` number, since 1 + 2 + 6 + 562 + 8 + 67 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1408).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 308689900 + ... + 308689940.

Almost surely, 2^12656286720 is an apocalyptic number.

12656286720 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 12656286720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29712614400).

12656286720 is an abundant number, since it is smaller than the sum of its proper divisors (46768942080).

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

12656286720 is a wasteful number, since it uses less digits than its factorization.

12656286720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 12656286720 in words is "twelve billion, six hundred fifty-six million, two hundred eighty-six thousand, seven hundred twenty".