8861718645 has 144 divisors (see below), whose sum is σ = 17964685440. Its totient is φ = 4026806784.

The previous prime is 8861718641. The next prime is 8861718659. The reversal of 8861718645 is 5468171688.

It is a happy number.

8861718645 is a `hidden beast` number, since 8 + 8 + 617 + 18 + 6 + 4 + 5 = 666.

It is not a de Polignac number, because 8861718645 - 2² = 8861718641 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 8861718591 and 8861718600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8861718641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5071662 + ... + 5073408.

It is an arithmetic number, because the mean of its divisors is an integer number (124754760).

Almost surely, 2^8861718645 is an apocalyptic number.

It is an amenable number.

8861718645 is an abundant number, since it is smaller than the sum of its proper divisors (9102966795).

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

8861718645 is a wasteful number, since it uses less digits than its factorization.

8861718645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 1820 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 8861718645 is about 94136.7019020743. The cubic root of 8861718645 is about 2069.3755765545.

The spelling of 8861718645 in words is "eight billion, eight hundred sixty-one million, seven hundred eighteen thousand, six hundred forty-five".