12456129751 has 4 divisors (see below), whose sum is σ = 13414293592. Its totient is φ = 11497965912.

The previous prime is 12456129727. The next prime is 12456129769. The reversal of 12456129751 is 15792165421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15792165421 = 31 ⋅509424691.

It is a cyclic number.

It is not a de Polignac number, because 12456129751 - 2⁹ = 12456129239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12456129698 and 12456129707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456121751) 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, 479081901 + ... + 479081926.

It is an arithmetic number, because the mean of its divisors is an integer number (3353573398).

Almost surely, 2^12456129751 is an apocalyptic number.

12456129751 is a deficient number, since it is larger than the sum of its proper divisors (958163841).

12456129751 is an equidigital number, since it uses as much as digits as its factorization.

12456129751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958163840.

The product of its digits is 151200, while the sum is 43.

The spelling of 12456129751 in words is "twelve billion, four hundred fifty-six million, one hundred twenty-nine thousand, seven hundred fifty-one".