12622599581 has 2 divisors, whose sum is σ = 12622599582. Its totient is φ = 12622599580.

The previous prime is 12622599481. The next prime is 12622599673. The reversal of 12622599581 is 18599522621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7990572100 + 4632027481 = 89390^2 + 68059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12622599581 is a prime.

It is a super-2 number, since 2×12622599581² (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 (12622599281) 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 as a sum of consecutive naturals, namely, 6311299790 + 6311299791.

It is an arithmetic number, because the mean of its divisors is an integer number (6311299791).

Almost surely, 2^12622599581 is an apocalyptic number.

It is an amenable number.

12622599581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12622599581 is an equidigital number, since it uses as much as digits as its factorization.

12622599581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 50.

The spelling of 12622599581 in words is "twelve billion, six hundred twenty-two million, five hundred ninety-nine thousand, five hundred eighty-one".