126711889937 has 2 divisors, whose sum is σ = 126711889938. Its totient is φ = 126711889936.

The previous prime is 126711889907. The next prime is 126711889987. The reversal of 126711889937 is 739988117621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95832965761 + 30878924176 = 309569^2 + 175724^2 .

It is a cyclic number.

It is not a de Polignac number, because 126711889937 - 2⁶ = 126711889873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126711889937.

It is not a weakly prime, because it can be changed into another prime (126711889907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63355944968 + 63355944969.

It is an arithmetic number, because the mean of its divisors is an integer number (63355944969).

Almost surely, 2^126711889937 is an apocalyptic number.

It is an amenable number.

126711889937 is a deficient number, since it is larger than the sum of its proper divisors (1).

126711889937 is an equidigital number, since it uses as much as digits as its factorization.

126711889937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 62.

The spelling of 126711889937 in words is "one hundred twenty-six billion, seven hundred eleven million, eight hundred eighty-nine thousand, nine hundred thirty-seven".