2163836745 has 48 divisors (see below), whose sum is σ = 4302105600. Its totient is φ = 985571712.

The previous prime is 2163836693. The next prime is 2163836747. The reversal of 2163836745 is 5476383612.

2163836745 is a `hidden beast` number, since 2 + 1 + 638 + 3 + 6 + 7 + 4 + 5 = 666.

It is not a de Polignac number, because 2163836745 - 2⁷ = 2163836617 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 2163836745.

It is not an unprimeable number, because it can be changed into a prime (2163836747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74856 + ... + 99654.

It is an arithmetic number, because the mean of its divisors is an integer number (89627200).

Almost surely, 2^2163836745 is an apocalyptic number.

It is an amenable number.

2163836745 is a deficient number, since it is larger than the sum of its proper divisors (2138268855).

2163836745 is a wasteful number, since it uses less digits than its factorization.

2163836745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25094 (or 25091 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 2163836745 is about 46517.0586451895. The cubic root of 2163836745 is about 1293.4257331970.

The spelling of 2163836745 in words is "two billion, one hundred sixty-three million, eight hundred thirty-six thousand, seven hundred forty-five".