632645021 has 8 divisors (see below), whose sum is σ = 679858560. Its totient is φ = 586542528.

The previous prime is 632644973. The next prime is 632645029. The reversal of 632645021 is 120546236.

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

It is a cyclic number.

It is not a de Polignac number, because 632645021 - 2¹⁴ = 632628637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632645029) 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, 276581 + ... + 278858.

It is an arithmetic number, because the mean of its divisors is an integer number (84982320).

Almost surely, 2^632645021 is an apocalyptic number.

It is an amenable number.

632645021 is a deficient number, since it is larger than the sum of its proper divisors (47213539).

632645021 is a wasteful number, since it uses less digits than its factorization.

632645021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555523.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 632645021 is about 25152.4356872252. The cubic root of 632645021 is about 858.4599357374.

The spelling of 632645021 in words is "six hundred thirty-two million, six hundred forty-five thousand, twenty-one".