126140613617 has 2 divisors, whose sum is σ = 126140613618. Its totient is φ = 126140613616.

The previous prime is 126140613611. The next prime is 126140613647. The reversal of 126140613617 is 716316041621.

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., 113463880336 + 12676733281 = 336844^2 + 112591^2 .

It is a cyclic number.

It is not a de Polignac number, because 126140613617 - 2²² = 126136419313 is a prime.

It is a super-2 number, since 2×126140613617² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126140613611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63070306808 + 63070306809.

It is an arithmetic number, because the mean of its divisors is an integer number (63070306809).

Almost surely, 2^126140613617 is an apocalyptic number.

It is an amenable number.

126140613617 is a deficient number, since it is larger than the sum of its proper divisors (1).

126140613617 is an equidigital number, since it uses as much as digits as its factorization.

126140613617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 126140613617 in words is "one hundred twenty-six billion, one hundred forty million, six hundred thirteen thousand, six hundred seventeen".