6386774879 has 4 divisors (see below), whose sum is σ = 6386956800. Its totient is φ = 6386592960.

The previous prime is 6386774843. The next prime is 6386774903. The reversal of 6386774879 is 9784776836.

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 6386774879 - 2⁸ = 6386774623 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 (6386774819) 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, 19679 + ... + 114720.

It is an arithmetic number, because the mean of its divisors is an integer number (1596739200).

Almost surely, 2^6386774879 is an apocalyptic number.

6386774879 is a deficient number, since it is larger than the sum of its proper divisors (181921).

6386774879 is a wasteful number, since it uses less digits than its factorization.

6386774879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181920.

The product of its digits is 85349376, while the sum is 65.

The square root of 6386774879 is about 79917.3002484443. The cubic root of 6386774879 is about 1855.3557854146.

The spelling of 6386774879 in words is "six billion, three hundred eighty-six million, seven hundred seventy-four thousand, eight hundred seventy-nine".