12650656648 has 16 divisors (see below), whose sum is σ = 27108550080. Its totient is φ = 5421709968.

The previous prime is 12650656637. The next prime is 12650656649. The reversal of 12650656648 is 84665605621.

It is a super-2 number, since 2×12650656648² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12650656649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112952236 + ... + 112952347.

It is an arithmetic number, because the mean of its divisors is an integer number (1694284380).

Almost surely, 2^12650656648 is an apocalyptic number.

It is an amenable number.

12650656648 is an abundant number, since it is smaller than the sum of its proper divisors (14457893432).

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

12650656648 is a wasteful number, since it uses less digits than its factorization.

12650656648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225904596 (or 225904592 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 12650656648 in words is "twelve billion, six hundred fifty million, six hundred fifty-six thousand, six hundred forty-eight".