6540332349 has 4 divisors (see below), whose sum is σ = 8720443136. Its totient is φ = 4360221564.

The previous prime is 6540332339. The next prime is 6540332363. The reversal of 6540332349 is 9432330456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6540332349 - 2²⁸ = 6271896893 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 (6540332339) 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, 1090055389 + ... + 1090055394.

It is an arithmetic number, because the mean of its divisors is an integer number (2180110784).

Almost surely, 2^6540332349 is an apocalyptic number.

It is an amenable number.

6540332349 is a deficient number, since it is larger than the sum of its proper divisors (2180110787).

6540332349 is a wasteful number, since it uses less digits than its factorization.

6540332349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180110786.

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 6540332349 is about 80872.3212786674. The cubic root of 6540332349 is about 1870.1076462001.

The spelling of 6540332349 in words is "six billion, five hundred forty million, three hundred thirty-two thousand, three hundred forty-nine".