6633172949 has 4 divisors (see below), whose sum is σ = 7143417036. Its totient is φ = 6122928864.

The previous prime is 6633172939. The next prime is 6633172961. The reversal of 6633172949 is 9492713366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2712534724 + 3920638225 = 52082^2 + 62615^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6633172949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6633172897 and 6633172906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6633172939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255122024 + ... + 255122049.

It is an arithmetic number, because the mean of its divisors is an integer number (1785854259).

Almost surely, 2^6633172949 is an apocalyptic number.

It is an amenable number.

6633172949 is a deficient number, since it is larger than the sum of its proper divisors (510244087).

6633172949 is a wasteful number, since it uses less digits than its factorization.

6633172949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510244086.

The product of its digits is 1469664, while the sum is 50.

The square root of 6633172949 is about 81444.2935324508. The cubic root of 6633172949 is about 1878.9148850651.

The spelling of 6633172949 in words is "six billion, six hundred thirty-three million, one hundred seventy-two thousand, nine hundred forty-nine".