126944383689917 has 2 divisors, whose sum is σ = 126944383689918. Its totient is φ = 126944383689916.

The previous prime is 126944383689901. The next prime is 126944383689941. The reversal of 126944383689917 is 719986383449621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115585097604601 + 11359286085316 = 10751051^2 + 3370354^2 .

It is a cyclic number.

It is not a de Polignac number, because 126944383689917 - 2⁴ = 126944383689901 is a prime.

It is a super-2 number, since 2×126944383689917² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126944383689817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63472191844958 + 63472191844959.

It is an arithmetic number, because the mean of its divisors is an integer number (63472191844959).

Almost surely, 2^{126944383689917} is an apocalyptic number.

It is an amenable number.

126944383689917 is a deficient number, since it is larger than the sum of its proper divisors (1).

126944383689917 is an equidigital number, since it uses as much as digits as its factorization.

126944383689917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386105856, while the sum is 80.

The spelling of 126944383689917 in words is "one hundred twenty-six trillion, nine hundred forty-four billion, three hundred eighty-three million, six hundred eighty-nine thousand, nine hundred seventeen".