8319779685 has 144 divisors (see below), whose sum is σ = 17815824000. Its totient is φ = 3516659712.

The previous prime is 8319779591. The next prime is 8319779711. The reversal of 8319779685 is 5869779138.

It is not a de Polignac number, because 8319779685 - 2⁷ = 8319779557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5370291 + ... + 5371839.

It is an arithmetic number, because the mean of its divisors is an integer number (123721000).

Almost surely, 2^8319779685 is an apocalyptic number.

8319779685 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8319779685 is an abundant number, since it is smaller than the sum of its proper divisors (9496044315).

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

8319779685 is a wasteful number, since it uses less digits than its factorization.

8319779685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 1640 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 8319779685 is about 91212.8263184515. The cubic root of 8319779685 is about 2026.3009217281.

The spelling of 8319779685 in words is "eight billion, three hundred nineteen million, seven hundred seventy-nine thousand, six hundred eighty-five".