12453856949 has 4 divisors (see below), whose sum is σ = 12688835436. Its totient is φ = 12218878464.

The previous prime is 12453856937. The next prime is 12453856963. The reversal of 12453856949 is 94965835421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11404744849 + 1049112100 = 106793^2 + 32390^2 .

It is a cyclic number.

It is not a de Polignac number, because 12453856949 - 2³² = 8158889653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12453856894 and 12453856903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12453853949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117489164 + ... + 117489269.

It is an arithmetic number, because the mean of its divisors is an integer number (3172208859).

Almost surely, 2^12453856949 is an apocalyptic number.

It is an amenable number.

12453856949 is a deficient number, since it is larger than the sum of its proper divisors (234978487).

12453856949 is an equidigital number, since it uses as much as digits as its factorization.

12453856949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234978486.

The product of its digits is 9331200, while the sum is 56.

The spelling of 12453856949 in words is "twelve billion, four hundred fifty-three million, eight hundred fifty-six thousand, nine hundred forty-nine".