126693756173 has 2 divisors, whose sum is σ = 126693756174. Its totient is φ = 126693756172.

The previous prime is 126693756157. The next prime is 126693756199. The reversal of 126693756173 is 371657396621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121088688484 + 5605067689 = 347978^2 + 74867^2 .

It is a cyclic number.

It is not a de Polignac number, because 126693756173 - 2⁴ = 126693756157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126693756073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63346878086 + 63346878087.

It is an arithmetic number, because the mean of its divisors is an integer number (63346878087).

Almost surely, 2^126693756173 is an apocalyptic number.

It is an amenable number.

126693756173 is a deficient number, since it is larger than the sum of its proper divisors (1).

126693756173 is an equidigital number, since it uses as much as digits as its factorization.

126693756173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 56.

The spelling of 126693756173 in words is "one hundred twenty-six billion, six hundred ninety-three million, seven hundred fifty-six thousand, one hundred seventy-three".