912644941891 has 2 divisors, whose sum is σ = 912644941892. Its totient is φ = 912644941890.

The previous prime is 912644941867. The next prime is 912644941921. The reversal of 912644941891 is 198149446219.

It is a weak prime.

It is an emirp because it is prime and its reverse (198149446219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 912644941891 - 2²⁵ = 912611387459 is a prime.

It is not a weakly prime, because it can be changed into another prime (912644941801) 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, 456322470945 + 456322470946.

It is an arithmetic number, because the mean of its divisors is an integer number (456322470946).

Almost surely, 2^912644941891 is an apocalyptic number.

912644941891 is a deficient number, since it is larger than the sum of its proper divisors (1).

912644941891 is an equidigital number, since it uses as much as digits as its factorization.

912644941891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 58.

The spelling of 912644941891 in words is "nine hundred twelve billion, six hundred forty-four million, nine hundred forty-one thousand, eight hundred ninety-one".