12257456649 has 8 divisors (see below), whose sum is σ = 16349894112. Its totient is φ = 8168328480.

The previous prime is 12257456591. The next prime is 12257456713. The reversal of 12257456649 is 94665475221.

It is a happy number.

12257456649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12257456649 - 2²¹ = 12255359497 is a prime.

It is a super-2 number, since 2×12257456649² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12257458649) 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 7 ways as a sum of consecutive naturals, for example, 818667 + ... + 833504.

It is an arithmetic number, because the mean of its divisors is an integer number (2043736764).

Almost surely, 2^12257456649 is an apocalyptic number.

It is an amenable number.

12257456649 is a deficient number, since it is larger than the sum of its proper divisors (4092437463).

12257456649 is a wasteful number, since it uses less digits than its factorization.

12257456649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654647.

The product of its digits is 3628800, while the sum is 51.

The spelling of 12257456649 in words is "twelve billion, two hundred fifty-seven million, four hundred fifty-six thousand, six hundred forty-nine".