6540150899 has 4 divisors (see below), whose sum is σ = 6540368664. Its totient is φ = 6539933136.

The previous prime is 6540150893. The next prime is 6540150907. The reversal of 6540150899 is 9980510456.

It is a happy number.

6540150899 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540150899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6540150893) 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, 54917 + ... + 126870.

It is an arithmetic number, because the mean of its divisors is an integer number (1635092166).

Almost surely, 2^6540150899 is an apocalyptic number.

6540150899 is a deficient number, since it is larger than the sum of its proper divisors (217765).

6540150899 is a wasteful number, since it uses less digits than its factorization.

6540150899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217764.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 6540150899 is about 80871.1994408393. The cubic root of 6540150899 is about 1870.0903517594.

The spelling of 6540150899 in words is "six billion, five hundred forty million, one hundred fifty thousand, eight hundred ninety-nine".