540246007991 has 4 divisors (see below), whose sum is σ = 540724526400. Its totient is φ = 539767489584.

The previous prime is 540246007933. The next prime is 540246008047. The reversal of 540246007991 is 199700642045.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 540246007991 - 2⁶ = 540246007927 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 (540246007591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239257511 + ... + 239259768.

It is an arithmetic number, because the mean of its divisors is an integer number (135181131600).

Almost surely, 2^540246007991 is an apocalyptic number.

540246007991 is a deficient number, since it is larger than the sum of its proper divisors (478518409).

540246007991 is a wasteful number, since it uses less digits than its factorization.

540246007991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478518408.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 540246007991 in words is "five hundred forty billion, two hundred forty-six million, seven thousand, nine hundred ninety-one".