6635564628 has 96 divisors (see below), whose sum is σ = 19620077568. Its totient is φ = 1695254400.

The previous prime is 6635564609. The next prime is 6635564701. The reversal of 6635564628 is 8264655366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2500 + ... + 115227.

It is an arithmetic number, because the mean of its divisors is an integer number (204375808).

Almost surely, 2^6635564628 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 6635564628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9810038784).

6635564628 is an abundant number, since it is smaller than the sum of its proper divisors (12984512940).

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

6635564628 is a wasteful number, since it uses less digits than its factorization.

6635564628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117813 (or 117811 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 51.

The square root of 6635564628 is about 81458.9751224504. The cubic root of 6635564628 is about 1879.1406805389.

The spelling of 6635564628 in words is "six billion, six hundred thirty-five million, five hundred sixty-four thousand, six hundred twenty-eight".