633680856845 has 4 divisors (see below), whose sum is σ = 760417028220. Its totient is φ = 506944685472.

The previous prime is 633680856797. The next prime is 633680856863. The reversal of 633680856845 is 548658086336.

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 137791667209 + 495889189636 = 371203^2 + 704194^2 .

It is a cyclic number.

It is not a de Polignac number, because 633680856845 - 2¹⁶ = 633680791309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63368085680 + ... + 63368085689.

It is an arithmetic number, because the mean of its divisors is an integer number (190104257055).

Almost surely, 2^633680856845 is an apocalyptic number.

It is an amenable number.

633680856845 is a deficient number, since it is larger than the sum of its proper divisors (126736171375).

633680856845 is a wasteful number, since it uses less digits than its factorization.

633680856845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126736171374.

The product of its (nonzero) digits is 99532800, while the sum is 62.

The spelling of 633680856845 in words is "six hundred thirty-three billion, six hundred eighty million, eight hundred fifty-six thousand, eight hundred forty-five".