632642099021 has 2 divisors, whose sum is σ = 632642099022. Its totient is φ = 632642099020.

The previous prime is 632642098993. The next prime is 632642099069. The reversal of 632642099021 is 120990246236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546728626921 + 85913472100 = 739411^2 + 293110^2 .

It is a cyclic number.

It is not a de Polignac number, because 632642099021 - 2¹⁴ = 632642082637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (632642099321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316321049510 + 316321049511.

It is an arithmetic number, because the mean of its divisors is an integer number (316321049511).

Almost surely, 2^632642099021 is an apocalyptic number.

It is an amenable number.

632642099021 is a deficient number, since it is larger than the sum of its proper divisors (1).

632642099021 is an equidigital number, since it uses as much as digits as its factorization.

632642099021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 632642099021 in words is "six hundred thirty-two billion, six hundred forty-two million, ninety-nine thousand, twenty-one".