8523686818 has 32 divisors (see below), whose sum is σ = 13357165680. Its totient is φ = 4075822080.

The previous prime is 8523686813. The next prime is 8523686861. The reversal of 8523686818 is 8186863258.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7885972809 + 637714009 = 88803^2 + 25253^2 .

It is not an unprimeable number, because it can be changed into a prime (8523686813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1135638 + ... + 1143118.

Almost surely, 2^8523686818 is an apocalyptic number.

8523686818 is a deficient number, since it is larger than the sum of its proper divisors (4833478862).

8523686818 is a wasteful number, since it uses less digits than its factorization.

8523686818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782.

The product of its digits is 4423680, while the sum is 55.

The square root of 8523686818 is about 92323.8150099962. The cubic root of 8523686818 is about 2042.7215069085.

The spelling of 8523686818 in words is "eight billion, five hundred twenty-three million, six hundred eighty-six thousand, eight hundred eighteen".