12647359956 has 288 divisors, whose sum is σ = 39563776000. Its totient is φ = 3069031680.

The previous prime is 12647359931. The next prime is 12647359957. The reversal of 12647359956 is 65995374621.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 12647359896 and 12647359905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647359957) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15255750 + ... + 15256578.

Almost surely, 2^12647359956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12647359956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19781888000).

12647359956 is an abundant number, since it is smaller than the sum of its proper divisors (26916416044).

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

12647359956 is a wasteful number, since it uses less digits than its factorization.

12647359956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 950 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 57.

The spelling of 12647359956 in words is "twelve billion, six hundred forty-seven million, three hundred fifty-nine thousand, nine hundred fifty-six".