8619799680 has 320 divisors, whose sum is σ = 32596949880. Its totient is φ = 2163179520.

The previous prime is 8619799627. The next prime is 8619799693. The reversal of 8619799680 is 869979168.

8619799680 is a `hidden beast` number, since 8 + 619 + 7 + 9 + 9 + 6 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7602444864 + 1017354816 = 87192^2 + 31896^2 .

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 876390 + ... + 886170.

Almost surely, 2^8619799680 is an apocalyptic number.

8619799680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8619799680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16298474940).

8619799680 is an abundant number, since it is smaller than the sum of its proper divisors (23977150200).

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

8619799680 is a wasteful number, since it uses less digits than its factorization.

8619799680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9829 (or 9808 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The square root of 8619799680 is about 92842.8763018467. The cubic root of 8619799680 is about 2050.3707185993.

The spelling of 8619799680 in words is "eight billion, six hundred nineteen million, seven hundred ninety-nine thousand, six hundred eighty".