165384053825 has 6 divisors (see below), whose sum is σ = 205076226774. Its totient is φ = 132307243040.

The previous prime is 165384053819. The next prime is 165384053837. The reversal of 165384053825 is 528350483561.

It can be written as a sum of positive squares in 3 ways, for example, as 19697561104 + 145686492721 = 140348^2 + 381689^2 .

It is not a de Polignac number, because 165384053825 - 2¹² = 165384049729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3307681052 + ... + 3307681101.

It is an arithmetic number, because the mean of its divisors is an integer number (34179371129).

Almost surely, 2^165384053825 is an apocalyptic number.

It is an amenable number.

165384053825 is a deficient number, since it is larger than the sum of its proper divisors (39692172949).

165384053825 is an equidigital number, since it uses as much as digits as its factorization.

165384053825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615362163 (or 6615362158 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 50.

The spelling of 165384053825 in words is "one hundred sixty-five billion, three hundred eighty-four million, fifty-three thousand, eight hundred twenty-five".