165415969 has 12 divisors (see below), whose sum is σ = 174942768. Its totient is φ = 156318120.

The previous prime is 165415951. The next prime is 165415973. The reversal of 165415969 is 969514561.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-165415969 is a prime.

It is a super-2 number, since 2×165415969² = 54724885600417922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165415909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39322 + ... + 43324.

It is an arithmetic number, because the mean of its divisors is an integer number (14578564).

Almost surely, 2^165415969 is an apocalyptic number.

It is an amenable number.

165415969 is a deficient number, since it is larger than the sum of its proper divisors (9526799).

165415969 is an equidigital number, since it uses as much as digits as its factorization.

165415969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 4077 counting only the distinct ones).

The product of its digits is 291600, while the sum is 46.

The square root of 165415969 is about 12861.4139580374. The cubic root of 165415969 is about 548.9411794717.

The spelling of 165415969 in words is "one hundred sixty-five million, four hundred fifteen thousand, nine hundred sixty-nine".