8681607816 has 32 divisors (see below), whose sum is σ = 24804594240. Its totient is φ = 2480459328.

The previous prime is 8681607797. The next prime is 8681607817. The reversal of 8681607816 is 6187061868.

It is not an unprimeable number, because it can be changed into a prime (8681607817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25837951 + ... + 25838286.

It is an arithmetic number, because the mean of its divisors is an integer number (775143570).

Almost surely, 2^8681607816 is an apocalyptic number.

It is an amenable number.

8681607816 is an abundant number, since it is smaller than the sum of its proper divisors (16122986424).

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

8681607816 is a wasteful number, since it uses less digits than its factorization.

8681607816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51676253 (or 51676249 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 8681607816 is about 93175.1459134892. The cubic root of 8681607816 is about 2055.2597683707.

The spelling of 8681607816 in words is "eight billion, six hundred eighty-one million, six hundred seven thousand, eight hundred sixteen".