12456476537 has 4 divisors (see below), whose sum is σ = 12458345460. Its totient is φ = 12454607616.

The previous prime is 12456476503. The next prime is 12456476561. The reversal of 12456476537 is 73567465421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73567465421 = 113 ⋅651039517.

It can be written as a sum of positive squares in 2 ways, for example, as 4828026256 + 7628450281 = 69484^2 + 87341^2 .

It is a cyclic number.

It is not a de Polignac number, because 12456476537 - 2¹⁴ = 12456460153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12456476237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924428 + ... + 937805.

It is an arithmetic number, because the mean of its divisors is an integer number (3114586365).

Almost surely, 2^12456476537 is an apocalyptic number.

It is an amenable number.

12456476537 is a deficient number, since it is larger than the sum of its proper divisors (1868923).

12456476537 is an equidigital number, since it uses as much as digits as its factorization.

12456476537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868922.

The product of its digits is 4233600, while the sum is 50.

The spelling of 12456476537 in words is "twelve billion, four hundred fifty-six million, four hundred seventy-six thousand, five hundred thirty-seven".