641888888747 has 2 divisors, whose sum is σ = 641888888748. Its totient is φ = 641888888746.

The previous prime is 641888888701. The next prime is 641888888749. The reversal of 641888888747 is 747888888146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641888888747 - 2⁸ = 641888888491 is a prime.

Together with 641888888749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641888888749) 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, 320944444373 + 320944444374.

It is an arithmetic number, because the mean of its divisors is an integer number (320944444374).

Almost surely, 2^641888888747 is an apocalyptic number.

641888888747 is a deficient number, since it is larger than the sum of its proper divisors (1).

641888888747 is an equidigital number, since it uses as much as digits as its factorization.

641888888747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1233125376, while the sum is 77.

The spelling of 641888888747 in words is "six hundred forty-one billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, seven hundred forty-seven".