32640506689 has 4 divisors (see below), whose sum is σ = 37303436224. Its totient is φ = 27977577156.

The previous prime is 32640506687. The next prime is 32640506699. The reversal of 32640506689 is 98660504623.

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 not a de Polignac number, because 32640506689 - 2¹ = 32640506687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32640506681) 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, 2331464757 + ... + 2331464770.

It is an arithmetic number, because the mean of its divisors is an integer number (9325859056).

Almost surely, 2^32640506689 is an apocalyptic number.

It is an amenable number.

32640506689 is a deficient number, since it is larger than the sum of its proper divisors (4662929535).

32640506689 is an equidigital number, since it uses as much as digits as its factorization.

32640506689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662929534.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 32640506689 in words is "thirty-two billion, six hundred forty million, five hundred six thousand, six hundred eighty-nine".