165356453573 has 2 divisors, whose sum is σ = 165356453574. Its totient is φ = 165356453572.

The previous prime is 165356453567. The next prime is 165356453593. The reversal of 165356453573 is 375354653561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161538078724 + 3818374849 = 401918^2 + 61793^2 .

It is a cyclic number.

It is not a de Polignac number, because 165356453573 - 2²² = 165352259269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165356453593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82678226786 + 82678226787.

It is an arithmetic number, because the mean of its divisors is an integer number (82678226787).

Almost surely, 2^165356453573 is an apocalyptic number.

It is an amenable number.

165356453573 is a deficient number, since it is larger than the sum of its proper divisors (1).

165356453573 is an equidigital number, since it uses as much as digits as its factorization.

165356453573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010000, while the sum is 53.

The spelling of 165356453573 in words is "one hundred sixty-five billion, three hundred fifty-six million, four hundred fifty-three thousand, five hundred seventy-three".