6389779836 has 24 divisors (see below), whose sum is σ = 16264894464. Its totient is φ = 1936296880.

The previous prime is 6389779793. The next prime is 6389779853.

It is a happy number.

6389779836 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24203580 + ... + 24203843.

It is an arithmetic number, because the mean of its divisors is an integer number (677703936).

Almost surely, 2^6389779836 is an apocalyptic number.

6389779836 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6389779836 is an abundant number, since it is smaller than the sum of its proper divisors (9875114628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6389779836 is a wasteful number, since it uses less digits than its factorization.

6389779836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48407441 (or 48407439 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 66.

The square root of 6389779836 is about 79936.0984537024. The cubic root of 6389779836 is about 1855.6467194310.

The spelling of 6389779836 in words is "six billion, three hundred eighty-nine million, seven hundred seventy-nine thousand, eight hundred thirty-six".