633768961 has 16 divisors (see below), whose sum is σ = 733822848. Its totient is φ = 536140800.

The previous prime is 633768943. The next prime is 633768977. The reversal of 633768961 is 169867336.

It is a cyclic number.

It is not a de Polignac number, because 633768961 - 2¹³ = 633760769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (633768931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175191 + ... + 178771.

It is an arithmetic number, because the mean of its divisors is an integer number (45863928).

Almost surely, 2^633768961 is an apocalyptic number.

It is an amenable number.

633768961 is a deficient number, since it is larger than the sum of its proper divisors (100053887).

633768961 is a wasteful number, since it uses less digits than its factorization.

633768961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912.

The product of its digits is 979776, while the sum is 49.

The square root of 633768961 is about 25174.7683405429. The cubic root of 633768961 is about 858.9680072001.

The spelling of 633768961 in words is "six hundred thirty-three million, seven hundred sixty-eight thousand, nine hundred sixty-one".