126635655137 has 2 divisors, whose sum is σ = 126635655138. Its totient is φ = 126635655136.

The previous prime is 126635655131. The next prime is 126635655169. The reversal of 126635655137 is 731556536621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98385104896 + 28250550241 = 313664^2 + 168079^2 .

It is a cyclic number.

It is not a de Polignac number, because 126635655137 - 2⁴ = 126635655121 is a prime.

It is not a weakly prime, because it can be changed into another prime (126635655131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63317827568 + 63317827569.

It is an arithmetic number, because the mean of its divisors is an integer number (63317827569).

Almost surely, 2^126635655137 is an apocalyptic number.

It is an amenable number.

126635655137 is a deficient number, since it is larger than the sum of its proper divisors (1).

126635655137 is an equidigital number, since it uses as much as digits as its factorization.

126635655137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402000, while the sum is 50.

The spelling of 126635655137 in words is "one hundred twenty-six billion, six hundred thirty-five million, six hundred fifty-five thousand, one hundred thirty-seven".