6340565279 has 4 divisors (see below), whose sum is σ = 6347391360. Its totient is φ = 6333739200.

The previous prime is 6340565251. The next prime is 6340565281. The reversal of 6340565279 is 9725650436.

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 6340565279 - 2¹⁶ = 6340499743 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 (6340565579) 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, 3411647 + ... + 3413504.

It is an arithmetic number, because the mean of its divisors is an integer number (1586847840).

Almost surely, 2^6340565279 is an apocalyptic number.

6340565279 is a deficient number, since it is larger than the sum of its proper divisors (6826081).

6340565279 is an equidigital number, since it uses as much as digits as its factorization.

6340565279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6826080.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The square root of 6340565279 is about 79627.6665424776. Note that the first 3 decimals coincide. The cubic root of 6340565279 is about 1850.8703262133.

The spelling of 6340565279 in words is "six billion, three hundred forty million, five hundred sixty-five thousand, two hundred seventy-nine".