12562624981 has 2 divisors, whose sum is σ = 12562624982. Its totient is φ = 12562624980.

The previous prime is 12562624961. The next prime is 12562625021. The reversal of 12562624981 is 18942626521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10324388881 + 2238236100 = 101609^2 + 47310^2 .

It is a cyclic number.

It is not a de Polignac number, because 12562624981 - 2¹³ = 12562616789 is a prime.

It is a super-2 number, since 2×12562624981² (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 (12562624961) 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, 6281312490 + 6281312491.

It is an arithmetic number, because the mean of its divisors is an integer number (6281312491).

Almost surely, 2^12562624981 is an apocalyptic number.

It is an amenable number.

12562624981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12562624981 is an equidigital number, since it uses as much as digits as its factorization.

12562624981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 46.

The spelling of 12562624981 in words is "twelve billion, five hundred sixty-two million, six hundred twenty-four thousand, nine hundred eighty-one".