12624744557 has 2 divisors, whose sum is σ = 12624744558. Its totient is φ = 12624744556.

The previous prime is 12624744533. The next prime is 12624744619. The reversal of 12624744557 is 75544742621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8479831396 + 4144913161 = 92086^2 + 64381^2 .

It is a cyclic number.

It is not a de Polignac number, because 12624744557 - 2¹² = 12624740461 is a prime.

It is a super-2 number, since 2×12624744557² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12624744157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6312372278 + 6312372279.

It is an arithmetic number, because the mean of its divisors is an integer number (6312372279).

Almost surely, 2^12624744557 is an apocalyptic number.

It is an amenable number.

12624744557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12624744557 is an equidigital number, since it uses as much as digits as its factorization.

12624744557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881600, while the sum is 47.

The spelling of 12624744557 in words is "twelve billion, six hundred twenty-four million, seven hundred forty-four thousand, five hundred fifty-seven".