8649435644 has 48 divisors (see below), whose sum is σ = 16284457728. Its totient is φ = 4005305088.

The previous prime is 8649435611. The next prime is 8649435659. The reversal of 8649435644 is 4465349468.

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, 1481459 + ... + 1487285.

It is an arithmetic number, because the mean of its divisors is an integer number (339259536).

Almost surely, 2^8649435644 is an apocalyptic number.

It is an amenable number.

8649435644 is a deficient number, since it is larger than the sum of its proper divisors (7635022084).

8649435644 is a wasteful number, since it uses less digits than its factorization.

8649435644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194 (or 6192 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 53.

The square root of 8649435644 is about 93002.3421425504. The cubic root of 8649435644 is about 2052.7178422309.

The spelling of 8649435644 in words is "eight billion, six hundred forty-nine million, four hundred thirty-five thousand, six hundred forty-four".