172244494445789 has 2 divisors, whose sum is σ = 172244494445790. Its totient is φ = 172244494445788.

The previous prime is 172244494445659. The next prime is 172244494445827. The reversal of 172244494445789 is 987544494442271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134544526044889 + 37699968400900 = 11599333^2 + 6140030^2 .

It is a cyclic number.

It is not a de Polignac number, because 172244494445789 - 2⁸ = 172244494445533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172244494442789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86122247222894 + 86122247222895.

It is an arithmetic number, because the mean of its divisors is an integer number (86122247222895).

Almost surely, 2^{172244494445789} is an apocalyptic number.

It is an amenable number.

172244494445789 is a deficient number, since it is larger than the sum of its proper divisors (1).

172244494445789 is an equidigital number, since it uses as much as digits as its factorization.

172244494445789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2601123840, while the sum is 74.

The spelling of 172244494445789 in words is "one hundred seventy-two trillion, two hundred forty-four billion, four hundred ninety-four million, four hundred forty-five thousand, seven hundred eighty-nine".