164396252389 has 2 divisors, whose sum is σ = 164396252390. Its totient is φ = 164396252388.

The previous prime is 164396252357. The next prime is 164396252393. The reversal of 164396252389 is 983252693461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156307948164 + 8088304225 = 395358^2 + 89935^2 .

It is a cyclic number.

It is not a de Polignac number, because 164396252389 - 2⁵ = 164396252357 is a prime.

It is a super-2 number, since 2×164396252389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164396252089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82198126194 + 82198126195.

It is an arithmetic number, because the mean of its divisors is an integer number (82198126195).

Almost surely, 2^164396252389 is an apocalyptic number.

It is an amenable number.

164396252389 is a deficient number, since it is larger than the sum of its proper divisors (1).

164396252389 is an equidigital number, since it uses as much as digits as its factorization.

164396252389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 58.

The spelling of 164396252389 in words is "one hundred sixty-four billion, three hundred ninety-six million, two hundred fifty-two thousand, three hundred eighty-nine".