331648640671 has 4 divisors (see below), whose sum is σ = 331649929000. Its totient is φ = 331647352344.

The previous prime is 331648640651. The next prime is 331648640689. The reversal of 331648640671 is 176046846133.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 331648640671 - 2¹⁵ = 331648607903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331648640651) 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 in 3 ways as a sum of consecutive naturals, for example, 110841 + ... + 821938.

It is an arithmetic number, because the mean of its divisors is an integer number (82912482250).

Almost surely, 2^331648640671 is an apocalyptic number.

331648640671 is a deficient number, since it is larger than the sum of its proper divisors (1288329).

331648640671 is an equidigital number, since it uses as much as digits as its factorization.

331648640671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288328.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 331648640671 in words is "three hundred thirty-one billion, six hundred forty-eight million, six hundred forty thousand, six hundred seventy-one".