12451987577 has 2 divisors, whose sum is σ = 12451987578. Its totient is φ = 12451987576.

The previous prime is 12451987547. The next prime is 12451987579. The reversal of 12451987577 is 77578915421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11018910841 + 1433076736 = 104971^2 + 37856^2 .

It is a cyclic number.

It is not a de Polignac number, because 12451987577 - 2¹⁰ = 12451986553 is a prime.

Together with 12451987579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12451987579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6225993788 + 6225993789.

It is an arithmetic number, because the mean of its divisors is an integer number (6225993789).

Almost surely, 2^12451987577 is an apocalyptic number.

It is an amenable number.

12451987577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12451987577 is an equidigital number, since it uses as much as digits as its factorization.

12451987577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4939200, while the sum is 56.

The spelling of 12451987577 in words is "twelve billion, four hundred fifty-one million, nine hundred eighty-seven thousand, five hundred seventy-seven".