12612507681 has 16 divisors (see below), whose sum is σ = 17097030720. Its totient is φ = 8268237120.

The previous prime is 12612507673. The next prime is 12612507701. The reversal of 12612507681 is 18670521621.

12612507681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12612507681 - 2³ = 12612507673 is a prime.

It is a super-2 number, since 2×12612507681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12612507581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903130 + ... + 916988.

It is an arithmetic number, because the mean of its divisors is an integer number (1068564420).

Almost surely, 2^12612507681 is an apocalyptic number.

It is an amenable number.

12612507681 is a deficient number, since it is larger than the sum of its proper divisors (4484523039).

12612507681 is a wasteful number, since it uses less digits than its factorization.

12612507681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18896.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 12612507681 in words is "twelve billion, six hundred twelve million, five hundred seven thousand, six hundred eighty-one".