12506396453 has 4 divisors (see below), whose sum is σ = 12575492748. Its totient is φ = 12437300160.

The previous prime is 12506396423. The next prime is 12506396491. The reversal of 12506396453 is 35469360521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35469360521 = 7 ⋅5067051503.

It can be written as a sum of positive squares in 2 ways, for example, as 2237006209 + 10269390244 = 47297^2 + 101338^2 .

It is a cyclic number.

It is not a de Polignac number, because 12506396453 - 2⁸ = 12506396197 is a prime.

It is a super-2 number, since 2×12506396453² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12506396423) 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, 34547876 + ... + 34548237.

It is an arithmetic number, because the mean of its divisors is an integer number (3143873187).

Almost surely, 2^12506396453 is an apocalyptic number.

It is an amenable number.

12506396453 is a deficient number, since it is larger than the sum of its proper divisors (69096295).

12506396453 is an equidigital number, since it uses as much as digits as its factorization.

12506396453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69096294.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 12506396453 in words is "twelve billion, five hundred six million, three hundred ninety-six thousand, four hundred fifty-three".