632638308923321 has 4 divisors (see below), whose sum is σ = 632717280134544. Its totient is φ = 632559337712100.

The previous prime is 632638308923249. The next prime is 632638308923329. The reversal of 632638308923321 is 123329803836236.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-632638308923321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (632638308923329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39485593595 + ... + 39485609616.

It is an arithmetic number, because the mean of its divisors is an integer number (158179320033636).

Almost surely, 2^{632638308923321} is an apocalyptic number.

It is an amenable number.

632638308923321 is a deficient number, since it is larger than the sum of its proper divisors (78971211223).

632638308923321 is an equidigital number, since it uses as much as digits as its factorization.

632638308923321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78971211222.

The product of its (nonzero) digits is 40310784, while the sum is 59.

The spelling of 632638308923321 in words is "six hundred thirty-two trillion, six hundred thirty-eight billion, three hundred eight million, nine hundred twenty-three thousand, three hundred twenty-one".