8091217680 has 160 divisors (see below), whose sum is σ = 30871190784. Its totient is φ = 1707153408.

The previous prime is 8091217663. The next prime is 8091217691. The reversal of 8091217680 is 867121908.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163399 + ... + 207078.

Almost surely, 2^8091217680 is an apocalyptic number.

8091217680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8091217680 is an abundant number, since it is smaller than the sum of its proper divisors (22779973104).

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

8091217680 is a wasteful number, since it uses less digits than its factorization.

8091217680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370513 (or 370507 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 8091217680 is about 89951.1961009969. The cubic root of 8091217680 is about 2007.5727637683.

The spelling of 8091217680 in words is "eight billion, ninety-one million, two hundred seventeen thousand, six hundred eighty".