2165476545 has 32 divisors (see below), whose sum is σ = 3982492800. Its totient is φ = 1115093952.

The previous prime is 2165476463. The next prime is 2165476549. The reversal of 2165476545 is 5456745612.

2165476545 is a `hidden beast` number, since 2 + 1 + 6 + 547 + 65 + 45 = 666.

It is not a de Polignac number, because 2165476545 - 2¹³ = 2165468353 is a prime.

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

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2165476545.

It is not an unprimeable number, because it can be changed into a prime (2165476549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272647 + ... + 280476.

It is an arithmetic number, because the mean of its divisors is an integer number (124452900).

Almost surely, 2^2165476545 is an apocalyptic number.

It is an amenable number.

2165476545 is a deficient number, since it is larger than the sum of its proper divisors (1817016255).

2165476545 is a wasteful number, since it uses less digits than its factorization.

2165476545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553166 (or 553160 counting only the distinct ones).

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

The square root of 2165476545 is about 46534.6810991544. The cubic root of 2165476545 is about 1293.7523789076.

The spelling of 2165476545 in words is "two billion, one hundred sixty-five million, four hundred seventy-six thousand, five hundred forty-five".