6635404136 has 32 divisors (see below), whose sum is σ = 12992616000. Its totient is φ = 3170935680.

The previous prime is 6635404133. The next prime is 6635404273. The reversal of 6635404136 is 6314045366.

It is a self number, because there is not a number n which added to its sum of digits gives 6635404136.

It is not an unprimeable number, because it can be changed into a prime (6635404133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229415 + ... + 256713.

It is an arithmetic number, because the mean of its divisors is an integer number (406019250).

Almost surely, 2^6635404136 is an apocalyptic number.

It is an amenable number.

6635404136 is a deficient number, since it is larger than the sum of its proper divisors (6357211864).

6635404136 is a wasteful number, since it uses less digits than its factorization.

6635404136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28649 (or 28645 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 6635404136 is about 81457.9900071196. The cubic root of 6635404136 is about 1879.1255303849.

The spelling of 6635404136 in words is "six billion, six hundred thirty-five million, four hundred four thousand, one hundred thirty-six".