6540671611 has 4 divisors (see below), whose sum is σ = 6543357952. Its totient is φ = 6537985272.

The previous prime is 6540671609. The next prime is 6540671623. The reversal of 6540671611 is 1161760456.

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 6540671611 - 2¹ = 6540671609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6540671651) 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, 1339515 + ... + 1344388.

It is an arithmetic number, because the mean of its divisors is an integer number (1635839488).

Almost surely, 2^6540671611 is an apocalyptic number.

6540671611 is a deficient number, since it is larger than the sum of its proper divisors (2686341).

6540671611 is a wasteful number, since it uses less digits than its factorization.

6540671611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686340.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 6540671611 is about 80874.4187676177. The cubic root of 6540671611 is about 1870.1399812282.

The spelling of 6540671611 in words is "six billion, five hundred forty million, six hundred seventy-one thousand, six hundred eleven".