8645649252 has 48 divisors (see below), whose sum is σ = 21069625920. Its totient is φ = 2756460672.

The previous prime is 8645649227. The next prime is 8645649253. The reversal of 8645649252 is 2529465468.

It is a junction number, because it is equal to n+sod(n) for n = 8645649195 and 8645649204.

It is not an unprimeable number, because it can be changed into a prime (8645649253) 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, 138823 + ... + 191214.

It is an arithmetic number, because the mean of its divisors is an integer number (438950540).

Almost surely, 2^8645649252 is an apocalyptic number.

It is an amenable number.

8645649252 is an abundant number, since it is smaller than the sum of its proper divisors (12423976668).

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

8645649252 is a wasteful number, since it uses less digits than its factorization.

8645649252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330140 (or 330138 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The square root of 8645649252 is about 92981.9834806722. The cubic root of 8645649252 is about 2052.4182647338.

The spelling of 8645649252 in words is "eight billion, six hundred forty-five million, six hundred forty-nine thousand, two hundred fifty-two".