12508428769 has 2 divisors, whose sum is σ = 12508428770. Its totient is φ = 12508428768.

The previous prime is 12508428677. The next prime is 12508428781. The reversal of 12508428769 is 96782480521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12229705744 + 278723025 = 110588^2 + 16695^2 .

It is a cyclic number.

It is not a de Polignac number, because 12508428769 - 2⁷ = 12508428641 is a prime.

It is a super-2 number, since 2×12508428769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12508423769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254214384 + 6254214385.

It is an arithmetic number, because the mean of its divisors is an integer number (6254214385).

Almost surely, 2^12508428769 is an apocalyptic number.

It is an amenable number.

12508428769 is a deficient number, since it is larger than the sum of its proper divisors (1).

12508428769 is an equidigital number, since it uses as much as digits as its factorization.

12508428769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 12508428769 in words is "twelve billion, five hundred eight million, four hundred twenty-eight thousand, seven hundred sixty-nine".