8321778086 has 16 divisors (see below), whose sum is σ = 13345267104. Its totient is φ = 3878108544.

The previous prime is 8321778079. The next prime is 8321778131. The reversal of 8321778086 is 6808771238.

It is a Curzon number.

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, 1184645 + ... + 1191648.

It is an arithmetic number, because the mean of its divisors is an integer number (834079194).

Almost surely, 2^8321778086 is an apocalyptic number.

8321778086 is a deficient number, since it is larger than the sum of its proper divisors (5023489018).

8321778086 is a wasteful number, since it uses less digits than its factorization.

8321778086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376415.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 8321778086 is about 91223.7802658934. The cubic root of 8321778086 is about 2026.4631470822.

The spelling of 8321778086 in words is "eight billion, three hundred twenty-one million, seven hundred seventy-eight thousand, eighty-six".