165745455 has 32 divisors (see below), whose sum is σ = 283910400. Its totient is φ = 82317312.

The previous prime is 165745441. The next prime is 165745487. The reversal of 165745455 is 554547561.

165745455 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 165745455 - 2¹⁴ = 165729071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11887 + ... + 21743.

It is an arithmetic number, because the mean of its divisors is an integer number (8872200).

Almost surely, 2^165745455 is an apocalyptic number.

165745455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165745455 is a deficient number, since it is larger than the sum of its proper divisors (118164945).

165745455 is a wasteful number, since it uses less digits than its factorization.

165745455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943.

The product of its digits is 420000, while the sum is 42.

The square root of 165745455 is about 12874.2166752001. The cubic root of 165745455 is about 549.3054096784.

The spelling of 165745455 in words is "one hundred sixty-five million, seven hundred forty-five thousand, four hundred fifty-five".