12995707656 has 128 divisors (see below), whose sum is σ = 34248130560. Its totient is φ = 4104172800.

The previous prime is 12995707651. The next prime is 12995707661. The reversal of 12995707656 is 65670759921.

It is an interprime number because it is at equal distance from previous prime (12995707651) and next prime (12995707661).

It is a junction number, because it is equal to n+sod(n) for n = 12995707596 and 12995707605.

It is not an unprimeable number, because it can be changed into a prime (12995707651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8292585 + ... + 8294151.

It is an arithmetic number, because the mean of its divisors is an integer number (267563520).

Almost surely, 2^12995707656 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 12995707656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17124065280).

12995707656 is an abundant number, since it is smaller than the sum of its proper divisors (21252422904).

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

12995707656 is a wasteful number, since it uses less digits than its factorization.

12995707656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 57.

The spelling of 12995707656 in words is "twelve billion, nine hundred ninety-five million, seven hundred seven thousand, six hundred fifty-six".