8645990836 has 48 divisors (see below), whose sum is σ = 17899442176. Its totient is φ = 3576835584.

The previous prime is 8645990827. The next prime is 8645990867. The reversal of 8645990836 is 6380995468.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98716 + ... + 164428.

Almost surely, 2^8645990836 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 8645990836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8949721088).

8645990836 is an abundant number, since it is smaller than the sum of its proper divisors (9253451340).

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

8645990836 is a wasteful number, since it uses less digits than its factorization.

8645990836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65888 (or 65886 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The square root of 8645990836 is about 92983.8202914894. The cubic root of 8645990836 is about 2052.4452942831.

The spelling of 8645990836 in words is "eight billion, six hundred forty-five million, nine hundred ninety thousand, eight hundred thirty-six".