2684215845 has 12 divisors (see below), whose sum is σ = 4652640876. Its totient is φ = 1431581760.

The previous prime is 2684215819. The next prime is 2684215873. The reversal of 2684215845 is 5485124862.

2684215845 is a `hidden beast` number, since 2 + 68 + 4 + 2 + 1 + 584 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 703787841 + 1980428004 = 26529^2 + 44502^2 .

It is not a de Polignac number, because 2684215845 - 2⁵ = 2684215813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 59649241 = 2684215845 / (2 + 6 + 8 + 4 + 2 + 1 + 5 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2684215845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29824576 + ... + 29824665.

It is an arithmetic number, because the mean of its divisors is an integer number (387720073).

Almost surely, 2^2684215845 is an apocalyptic number.

It is an amenable number.

2684215845 is a deficient number, since it is larger than the sum of its proper divisors (1968425031).

2684215845 is a wasteful number, since it uses less digits than its factorization.

2684215845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59649252 (or 59649249 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 2684215845 is about 51809.4184970262. The cubic root of 2684215845 is about 1389.7578801236.

The spelling of 2684215845 in words is "two billion, six hundred eighty-four million, two hundred fifteen thousand, eight hundred forty-five".