540006644665 has 16 divisors (see below), whose sum is σ = 686224490112. Its totient is φ = 406534927104.

The previous prime is 540006644657. The next prime is 540006644677. The reversal of 540006644665 is 566446600045.

It is a cyclic number.

It is not a de Polignac number, because 540006644665 - 2³ = 540006644657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145252 + ... + 1049338.

It is an arithmetic number, because the mean of its divisors is an integer number (42889030632).

Almost surely, 2^540006644665 is an apocalyptic number.

It is an amenable number.

540006644665 is a deficient number, since it is larger than the sum of its proper divisors (146217845447).

540006644665 is a wasteful number, since it uses less digits than its factorization.

540006644665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911136.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 540006644665 in words is "five hundred forty billion, six million, six hundred forty-four thousand, six hundred sixty-five".