633642001023 has 4 divisors (see below), whose sum is σ = 844856001368. Its totient is φ = 422428000680.

The previous prime is 633642000989. The next prime is 633642001067. The reversal of 633642001023 is 320100246336.

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

It is not a de Polignac number, because 633642001023 - 2¹⁰ = 633641999999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633642001123) 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 3 ways as a sum of consecutive naturals, for example, 105607000168 + ... + 105607000173.

It is an arithmetic number, because the mean of its divisors is an integer number (211214000342).

Almost surely, 2^633642001023 is an apocalyptic number.

633642001023 is a deficient number, since it is larger than the sum of its proper divisors (211214000345).

633642001023 is a wasteful number, since it uses less digits than its factorization.

633642001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211214000344.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 633642001023 its reverse (320100246336), we get a palindrome (953742247359).

The spelling of 633642001023 in words is "six hundred thirty-three billion, six hundred forty-two million, one thousand, twenty-three".