165572645 has 8 divisors (see below), whose sum is σ = 227071104. Its totient is φ = 113535504.

The previous prime is 165572609. The next prime is 165572677. The reversal of 165572645 is 546275561.

165572645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165572645 - 2⁸ = 165572389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365289 + ... + 2365358.

It is an arithmetic number, because the mean of its divisors is an integer number (28383888).

Almost surely, 2^165572645 is an apocalyptic number.

It is an amenable number.

165572645 is a deficient number, since it is larger than the sum of its proper divisors (61498459).

165572645 is an equidigital number, since it uses as much as digits as its factorization.

165572645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730659.

The product of its digits is 252000, while the sum is 41.

The square root of 165572645 is about 12867.5034486104. The cubic root of 165572645 is about 549.1144371669.

The spelling of 165572645 in words is "one hundred sixty-five million, five hundred seventy-two thousand, six hundred forty-five".