165894057 has 36 divisors (see below), whose sum is σ = 281298420. Its totient is φ = 93929472.

The previous prime is 165894049. The next prime is 165894059. The reversal of 165894057 is 750498561.

165894057 is a `hidden beast` number, since 16 + 589 + 4 + 0 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25613721 + 140280336 = 5061^2 + 11844^2 .

It is not a de Polignac number, because 165894057 - 2³ = 165894049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165894059) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 48169 + ... + 51497.

It is an arithmetic number, because the mean of its divisors is an integer number (7813845).

Almost surely, 2^165894057 is an apocalyptic number.

It is an amenable number.

165894057 is a deficient number, since it is larger than the sum of its proper divisors (115404363).

165894057 is a wasteful number, since it uses less digits than its factorization.

165894057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462 (or 3452 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 165894057 is about 12879.9866847757. The cubic root of 165894057 is about 549.4695237807.

The spelling of 165894057 in words is "one hundred sixty-five million, eight hundred ninety-four thousand, fifty-seven".