165788223253 has 2 divisors, whose sum is σ = 165788223254. Its totient is φ = 165788223252.

The previous prime is 165788223233. The next prime is 165788223301. The reversal of 165788223253 is 352322887561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163570095844 + 2218127409 = 404438^2 + 47097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165788223253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165788223253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165788223233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82894111626 + 82894111627.

It is an arithmetic number, because the mean of its divisors is an integer number (82894111627).

Almost surely, 2^165788223253 is an apocalyptic number.

It is an amenable number.

165788223253 is a deficient number, since it is larger than the sum of its proper divisors (1).

165788223253 is an equidigital number, since it uses as much as digits as its factorization.

165788223253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 52.

The spelling of 165788223253 in words is "one hundred sixty-five billion, seven hundred eighty-eight million, two hundred twenty-three thousand, two hundred fifty-three".