540611665 has 24 divisors (see below), whose sum is σ = 744093504. Its totient is φ = 376068000.

The previous prime is 540611641. The next prime is 540611723. The reversal of 540611665 is 566116045.

It is a happy number.

It is not a de Polignac number, because 540611665 - 2⁵ = 540611633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 540611665.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5511 + ... + 33340.

It is an arithmetic number, because the mean of its divisors is an integer number (31003896).

Almost surely, 2^540611665 is an apocalyptic number.

540611665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

540611665 is a deficient number, since it is larger than the sum of its proper divisors (203481839).

540611665 is a wasteful number, since it uses less digits than its factorization.

540611665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38901 (or 38890 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 540611665 is about 23251.0572877880. The cubic root of 540611665 is about 814.6326345635.

It can be divided in two parts, 5406 and 11665, that added together give a palindrome (17071).

The spelling of 540611665 in words is "five hundred forty million, six hundred eleven thousand, six hundred sixty-five".