165752109 has 16 divisors (see below), whose sum is σ = 246668800. Its totient is φ = 110001888.

The previous prime is 165752101. The next prime is 165752137. The reversal of 165752109 is 901257561.

165752109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165752109 - 2³ = 165752101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165752101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7744 + ... + 19785.

It is an arithmetic number, because the mean of its divisors is an integer number (15416800).

Almost surely, 2^165752109 is an apocalyptic number.

It is an amenable number.

165752109 is a deficient number, since it is larger than the sum of its proper divisors (80916691).

165752109 is a wasteful number, since it uses less digits than its factorization.

165752109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27761 (or 27755 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 165752109 is about 12874.4750960962. The cubic root of 165752109 is about 549.3127603662.

The spelling of 165752109 in words is "one hundred sixty-five million, seven hundred fifty-two thousand, one hundred nine".