126441940169 has 2 divisors, whose sum is σ = 126441940170. Its totient is φ = 126441940168.

The previous prime is 126441940139. The next prime is 126441940237. The reversal of 126441940169 is 961049144621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97256659600 + 29185280569 = 311860^2 + 170837^2 .

It is a cyclic number.

It is not a de Polignac number, because 126441940169 - 2³⁶ = 57722463433 is a prime.

It is a super-2 number, since 2×126441940169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126441940139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63220970084 + 63220970085.

It is an arithmetic number, because the mean of its divisors is an integer number (63220970085).

Almost surely, 2^126441940169 is an apocalyptic number.

It is an amenable number.

126441940169 is a deficient number, since it is larger than the sum of its proper divisors (1).

126441940169 is an equidigital number, since it uses as much as digits as its factorization.

126441940169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 126441940169 in words is "one hundred twenty-six billion, four hundred forty-one million, nine hundred forty thousand, one hundred sixty-nine".