6634943136 has 72 divisors (see below), whose sum is σ = 19126647540. Its totient is φ = 2181344256.

The previous prime is 6634943131. The next prime is 6634943149. The reversal of 6634943136 is 6313494366.

6634943136 is a `hidden beast` number, since 6 + 634 + 9 + 4 + 3 + 1 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6014933136 + 620010000 = 77556^2 + 24900^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 6634943091 and 6634943100.

It is not an unprimeable number, because it can be changed into a prime (6634943131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136771 + ... + 178818.

Almost surely, 2^6634943136 is an apocalyptic number.

It is an amenable number.

6634943136 is an abundant number, since it is smaller than the sum of its proper divisors (12491704404).

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

6634943136 is a wasteful number, since it uses less digits than its factorization.

6634943136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315678 (or 315667 counting only the distinct ones).

The product of its digits is 839808, while the sum is 45.

The square root of 6634943136 is about 81455.1602785238. The cubic root of 6634943136 is about 1879.0820114615.

The spelling of 6634943136 in words is "six billion, six hundred thirty-four million, nine hundred forty-three thousand, one hundred thirty-six".