632691647989 has 2 divisors, whose sum is σ = 632691647990. Its totient is φ = 632691647988.

The previous prime is 632691647957. The next prime is 632691648013. The reversal of 632691647989 is 989746196236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606594860964 + 26096787025 = 778842^2 + 161545^2 .

It is a cyclic number.

It is not a de Polignac number, because 632691647989 - 2⁵ = 632691647957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (632691647789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316345823994 + 316345823995.

It is an arithmetic number, because the mean of its divisors is an integer number (316345823995).

Almost surely, 2^632691647989 is an apocalyptic number.

It is an amenable number.

632691647989 is a deficient number, since it is larger than the sum of its proper divisors (1).

632691647989 is an equidigital number, since it uses as much as digits as its factorization.

632691647989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211631616, while the sum is 70.

The spelling of 632691647989 in words is "six hundred thirty-two billion, six hundred ninety-one million, six hundred forty-seven thousand, nine hundred eighty-nine".