12651251056 has 20 divisors (see below), whose sum is σ = 24927255000. Its totient is φ = 6218411072.

The previous prime is 12651251051. The next prime is 12651251083. The reversal of 12651251056 is 65015215621.

It is a super-2 number, since 2×12651251056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651251051) 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, 6699931 + ... + 6701818.

It is an arithmetic number, because the mean of its divisors is an integer number (1246362750).

Almost surely, 2^12651251056 is an apocalyptic number.

12651251056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12651251056 is a deficient number, since it is larger than the sum of its proper divisors (12276003944).

12651251056 is a wasteful number, since it uses less digits than its factorization.

12651251056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401816 (or 13401810 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 12651251056 its reverse (65015215621), we get a palindrome (77666466677).

The spelling of 12651251056 in words is "twelve billion, six hundred fifty-one million, two hundred fifty-one thousand, fifty-six".