6635985264 has 50 divisors (see below), whose sum is σ = 19206470360. Its totient is φ = 2211994656.

The previous prime is 6635985263. The next prime is 6635985281. The reversal of 6635985264 is 4625895366.

6635985264 is a `hidden beast` number, since 6 + 63 + 59 + 8 + 526 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 6635985264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6635985263) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2558884 + ... + 2561475.

Almost surely, 2^6635985264 is an apocalyptic number.

It is an amenable number.

6635985264 is an abundant number, since it is smaller than the sum of its proper divisors (12570485096).

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

6635985264 is a wasteful number, since it uses less digits than its factorization.

6635985264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120379 (or 5120364 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The square root of 6635985264 is about 81461.5569701439. The cubic root of 6635985264 is about 1879.1803866559.

The spelling of 6635985264 in words is "six billion, six hundred thirty-five million, nine hundred eighty-five thousand, two hundred sixty-four".