6540779822 has 4 divisors (see below), whose sum is σ = 9811169736. Its totient is φ = 3270389910.

The previous prime is 6540779797. The next prime is 6540779831. The reversal of 6540779822 is 2289770456.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1635194954 + ... + 1635194957.

It is an arithmetic number, because the mean of its divisors is an integer number (2452792434).

Almost surely, 2^6540779822 is an apocalyptic number.

6540779822 is a deficient number, since it is larger than the sum of its proper divisors (3270389914).

6540779822 is a wasteful number, since it uses less digits than its factorization.

6540779822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270389913.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 6540779822 is about 80875.0877712043. The cubic root of 6540779822 is about 1870.1502945728.

The spelling of 6540779822 in words is "six billion, five hundred forty million, seven hundred seventy-nine thousand, eight hundred twenty-two".