8231661328 has 20 divisors (see below), whose sum is σ = 17398739088. Its totient is φ = 3741664160.

The previous prime is 8231661293. The next prime is 8231661359.

8231661328 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×8231661328³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23385226 + ... + 23385577.

Almost surely, 2^8231661328 is an apocalyptic number.

8231661328 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8231661328 is an abundant number, since it is smaller than the sum of its proper divisors (9167077760).

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

8231661328 is a wasteful number, since it uses less digits than its factorization.

8231661328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46770822 (or 46770816 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 8231661328 is about 90728.5033933659. The cubic root of 8231661328 is about 2019.1217081670.

The spelling of 8231661328 in words is "eight billion, two hundred thirty-one million, six hundred sixty-one thousand, three hundred twenty-eight".