540711809 has 16 divisors (see below), whose sum is σ = 627051456. Its totient is φ = 460800000.

The previous prime is 540711763. The next prime is 540711811. The reversal of 540711809 is 908117045.

It is a cyclic number.

It is not a de Polignac number, because 540711809 - 2²⁸ = 272276353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540711859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42434 + ... + 53684.

It is an arithmetic number, because the mean of its divisors is an integer number (39190716).

Almost surely, 2^540711809 is an apocalyptic number.

It is an amenable number.

540711809 is a deficient number, since it is larger than the sum of its proper divisors (86339647).

540711809 is a wasteful number, since it uses less digits than its factorization.

540711809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11536.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 540711809 is about 23253.2107245430. The cubic root of 540711809 is about 814.6829328577.

The spelling of 540711809 in words is "five hundred forty million, seven hundred eleven thousand, eight hundred nine".