6635646441 has 48 divisors (see below), whose sum is σ = 10706841600. Its totient is φ = 4094822160.

The previous prime is 6635646389. The next prime is 6635646461. The reversal of 6635646441 is 1446465366.

6635646441 is a `hidden beast` number, since 6 + 635 + 6 + 4 + 6 + 4 + 4 + 1 = 666.

It is not a de Polignac number, because 6635646441 - 2⁷ = 6635646313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6635646461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154110 + ... + 192408.

It is an arithmetic number, because the mean of its divisors is an integer number (223059200).

Almost surely, 2^6635646441 is an apocalyptic number.

It is an amenable number.

6635646441 is a deficient number, since it is larger than the sum of its proper divisors (4071195159).

6635646441 is a wasteful number, since it uses less digits than its factorization.

6635646441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38368 (or 38356 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 6635646441 is about 81459.4772939282. The cubic root of 6635646441 is about 1879.1484034438.

The spelling of 6635646441 in words is "six billion, six hundred thirty-five million, six hundred forty-six thousand, four hundred forty-one".