12656455560 has 384 divisors, whose sum is σ = 51086131200. Its totient is φ = 2651927040.

The previous prime is 12656455549. The next prime is 12656455601. The reversal of 12656455560 is 6555465621.

12656455560 is a `hidden beast` number, since 1 + 2 + 6 + 56 + 45 + 556 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1480017 + ... + 1488543.

It is an arithmetic number, because the mean of its divisors is an integer number (133036800).

Almost surely, 2^12656455560 is an apocalyptic number.

12656455560 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 12656455560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25543065600).

12656455560 is an abundant number, since it is smaller than the sum of its proper divisors (38429675640).

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

12656455560 is a wasteful number, since it uses less digits than its factorization.

12656455560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8601 (or 8594 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 12656455560 in words is "twelve billion, six hundred fifty-six million, four hundred fifty-five thousand, five hundred sixty".