5540659645 has 4 divisors (see below), whose sum is σ = 6648791580. Its totient is φ = 4432527712.

The previous prime is 5540659639. The next prime is 5540659687. The reversal of 5540659645 is 5469560455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5469560455 = 5 ⋅1093912091.

It can be written as a sum of positive squares in 2 ways, for example, as 4303097604 + 1237562041 = 65598^2 + 35179^2 .

It is a cyclic number.

It is not a de Polignac number, because 5540659645 - 2¹⁵ = 5540626877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554065960 + ... + 554065969.

It is an arithmetic number, because the mean of its divisors is an integer number (1662197895).

Almost surely, 2^5540659645 is an apocalyptic number.

It is an amenable number.

5540659645 is a deficient number, since it is larger than the sum of its proper divisors (1108131935).

5540659645 is a wasteful number, since it uses less digits than its factorization.

5540659645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108131934.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The square root of 5540659645 is about 74435.6073730846. The cubic root of 5540659645 is about 1769.5132717453.

The spelling of 5540659645 in words is "five billion, five hundred forty million, six hundred fifty-nine thousand, six hundred forty-five".