633672516621 has 8 divisors (see below), whose sum is σ = 867731734624. Its totient is φ = 411030821520.

The previous prime is 633672516583. The next prime is 633672516649. The reversal of 633672516621 is 126615276336.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 633672516621 - 2¹⁹ = 633671992333 is a prime.

It is a super-3 number, since 3×633672516621³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633672516721) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2854380595 + ... + 2854380816.

It is an arithmetic number, because the mean of its divisors is an integer number (108466466828).

Almost surely, 2^633672516621 is an apocalyptic number.

It is an amenable number.

633672516621 is a deficient number, since it is larger than the sum of its proper divisors (234059218003).

633672516621 is a wasteful number, since it uses less digits than its factorization.

633672516621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708761451.

The product of its digits is 1632960, while the sum is 48.

The spelling of 633672516621 in words is "six hundred thirty-three billion, six hundred seventy-two million, five hundred sixteen thousand, six hundred twenty-one".