165620085053 has 2 divisors, whose sum is σ = 165620085054. Its totient is φ = 165620085052.

The previous prime is 165620085047. The next prime is 165620085079. The reversal of 165620085053 is 350580026561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92675798329 + 72944286724 = 304427^2 + 270082^2 .

It is a cyclic number.

It is not a de Polignac number, because 165620085053 - 2³² = 161325117757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165620085053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165620085023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82810042526 + 82810042527.

It is an arithmetic number, because the mean of its divisors is an integer number (82810042527).

Almost surely, 2^165620085053 is an apocalyptic number.

It is an amenable number.

165620085053 is a deficient number, since it is larger than the sum of its proper divisors (1).

165620085053 is an equidigital number, since it uses as much as digits as its factorization.

165620085053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 165620085053 in words is "one hundred sixty-five billion, six hundred twenty million, eighty-five thousand, fifty-three".