540640986591 has 8 divisors (see below), whose sum is σ = 725446080304. Its totient is φ = 358131608640.

The previous prime is 540640986577. The next prime is 540640986631. The reversal of 540640986591 is 195689046045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 540640986591 - 2¹⁸ = 540640724447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540640986491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573928390 + ... + 573929331.

It is an arithmetic number, because the mean of its divisors is an integer number (90680760038).

Almost surely, 2^540640986591 is an apocalyptic number.

540640986591 is a deficient number, since it is larger than the sum of its proper divisors (184805093713).

540640986591 is a wasteful number, since it uses less digits than its factorization.

540640986591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147857881.

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 540640986591 in words is "five hundred forty billion, six hundred forty million, nine hundred eighty-six thousand, five hundred ninety-one".