541288665 has 12 divisors (see below), whose sum is σ = 938233764. Its totient is φ = 288687264.

The previous prime is 541288633. The next prime is 541288669. The reversal of 541288665 is 566882145.

541288665 is a `hidden beast` number, since 541 + 28 + 86 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 239259024 + 302029641 = 15468^2 + 17379^2 .

It is not a de Polignac number, because 541288665 - 2⁵ = 541288633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 12028637 = 541288665 / (5 + 4 + 1 + 2 + 8 + 8 + 6 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 541288665.

It is not an unprimeable number, because it can be changed into a prime (541288669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6014274 + ... + 6014363.

It is an arithmetic number, because the mean of its divisors is an integer number (78186147).

Almost surely, 2^541288665 is an apocalyptic number.

It is an amenable number.

541288665 is a deficient number, since it is larger than the sum of its proper divisors (396945099).

541288665 is a wasteful number, since it uses less digits than its factorization.

541288665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12028648 (or 12028645 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 541288665 is about 23265.6112105399. The cubic root of 541288665 is about 814.9725435191.

The spelling of 541288665 in words is "five hundred forty-one million, two hundred eighty-eight thousand, six hundred sixty-five".