126512026369 has 2 divisors, whose sum is σ = 126512026370. Its totient is φ = 126512026368.

The previous prime is 126512026367. The next prime is 126512026387. The reversal of 126512026369 is 963620215621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88276134769 + 38235891600 = 297113^2 + 195540^2 .

It is a cyclic number.

It is not a de Polignac number, because 126512026369 - 2¹ = 126512026367 is a prime.

It is a super-2 number, since 2×126512026369² (a number of 23 digits) contains 22 as substring.

Together with 126512026367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126512026367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63256013184 + 63256013185.

It is an arithmetic number, because the mean of its divisors is an integer number (63256013185).

Almost surely, 2^126512026369 is an apocalyptic number.

It is an amenable number.

126512026369 is a deficient number, since it is larger than the sum of its proper divisors (1).

126512026369 is an equidigital number, since it uses as much as digits as its factorization.

126512026369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 126512026369 in words is "one hundred twenty-six billion, five hundred twelve million, twenty-six thousand, three hundred sixty-nine".