6540099539 has 4 divisors (see below), whose sum is σ = 6716859024. Its totient is φ = 6363340056.

The previous prime is 6540099523. The next prime is 6540099541. The reversal of 6540099539 is 9359900456.

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 6540099539 - 2⁴ = 6540099523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6540099589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88379687 + ... + 88379760.

It is an arithmetic number, because the mean of its divisors is an integer number (1679214756).

Almost surely, 2^6540099539 is an apocalyptic number.

6540099539 is a deficient number, since it is larger than the sum of its proper divisors (176759485).

6540099539 is a wasteful number, since it uses less digits than its factorization.

6540099539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176759484.

The product of its (nonzero) digits is 1312200, while the sum is 50.

The square root of 6540099539 is about 80870.8818982457. The cubic root of 6540099539 is about 1870.0854564548.

The spelling of 6540099539 in words is "six billion, five hundred forty million, ninety-nine thousand, five hundred thirty-nine".