540505645 has 4 divisors (see below), whose sum is σ = 648606780. Its totient is φ = 432404512.

The previous prime is 540505619. The next prime is 540505663. The reversal of 540505645 is 546505045.

540505645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103612041 + 436893604 = 10179^2 + 20902^2 .

It is a cyclic number.

It is not a de Polignac number, because 540505645 - 2⁵ = 540505613 is a prime.

It is a super-3 number, since 3×540505645³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 540505645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54050560 + ... + 54050569.

It is an arithmetic number, because the mean of its divisors is an integer number (162151695).

Almost surely, 2^540505645 is an apocalyptic number.

It is an amenable number.

540505645 is a deficient number, since it is larger than the sum of its proper divisors (108101135).

540505645 is a wasteful number, since it uses less digits than its factorization.

540505645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108101134.

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 540505645 is about 23248.7772796765. Note that the first 3 decimals coincide. The cubic root of 540505645 is about 814.5793782220.

It can be divided in two parts, 54050 and 5645, that added together give a palindrome (59695).

The spelling of 540505645 in words is "five hundred forty million, five hundred five thousand, six hundred forty-five".