8316991872 has 672 divisors, whose sum is σ = 30883851720. Its totient is φ = 2215600128.

The previous prime is 8316991849. The next prime is 8316991913. The reversal of 8316991872 is 2781996138.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 77728843 + ... + 77728949.

Almost surely, 2^8316991872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8316991872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15441925860).

8316991872 is an abundant number, since it is smaller than the sum of its proper divisors (22566859848).

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

8316991872 is a wasteful number, since it uses less digits than its factorization.

8316991872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 136 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 8316991872 is about 91197.5431248013. The cubic root of 8316991872 is about 2026.0745704169.

The spelling of 8316991872 in words is "eight billion, three hundred sixteen million, nine hundred ninety-one thousand, eight hundred seventy-two".