8645620464 has 120 divisors (see below), whose sum is σ = 27428470160. Its totient is φ = 2520170496.

The previous prime is 8645620439. The next prime is 8645620481. The reversal of 8645620464 is 4640265468.

8645620464 is a `hidden beast` number, since 86 + 4 + 562 + 0 + 4 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85969 + ... + 157104.

Almost surely, 2^8645620464 is an apocalyptic number.

It is an amenable number.

8645620464 is an abundant number, since it is smaller than the sum of its proper divisors (18782849696).

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

8645620464 is a wasteful number, since it uses less digits than its factorization.

8645620464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243119 (or 243110 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The square root of 8645620464 is about 92981.8286763602. The cubic root of 8645620464 is about 2052.4159867062.

The spelling of 8645620464 in words is "eight billion, six hundred forty-five million, six hundred twenty thousand, four hundred sixty-four".