2165574465 has 24 divisors (see below), whose sum is σ = 3801183360. Its totient is φ = 1140351264.

The previous prime is 2165574403. The next prime is 2165574487. The reversal of 2165574465 is 5644755612.

2165574465 is a `hidden beast` number, since 2 + 16 + 5 + 574 + 4 + 65 = 666.

It is not a de Polignac number, because 2165574465 - 2²² = 2161380161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2165574465.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301027 + ... + 308136.

It is an arithmetic number, because the mean of its divisors is an integer number (158382640).

Almost surely, 2^2165574465 is an apocalyptic number.

It is an amenable number.

2165574465 is a deficient number, since it is larger than the sum of its proper divisors (1635608895).

2165574465 is a wasteful number, since it uses less digits than its factorization.

2165574465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609253 (or 609250 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 2165574465 is about 46535.7332057850. The cubic root of 2165574465 is about 1293.7718792071.

The spelling of 2165574465 in words is "two billion, one hundred sixty-five million, five hundred seventy-four thousand, four hundred sixty-five".