126815951489 has 2 divisors, whose sum is σ = 126815951490. Its totient is φ = 126815951488.

The previous prime is 126815951417. The next prime is 126815951491. The reversal of 126815951489 is 984159518621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88875534400 + 37940417089 = 298120^2 + 194783^2 .

It is a cyclic number.

It is not a de Polignac number, because 126815951489 - 2⁸ = 126815951233 is a prime.

Together with 126815951491, 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 (126815951089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63407975744 + 63407975745.

It is an arithmetic number, because the mean of its divisors is an integer number (63407975745).

Almost surely, 2^126815951489 is an apocalyptic number.

It is an amenable number.

126815951489 is a deficient number, since it is larger than the sum of its proper divisors (1).

126815951489 is an equidigital number, since it uses as much as digits as its factorization.

126815951489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 59.

The spelling of 126815951489 in words is "one hundred twenty-six billion, eight hundred fifteen million, nine hundred fifty-one thousand, four hundred eighty-nine".