844424930131961 has 2 divisors, whose sum is σ = 844424930131962. Its totient is φ = 844424930131960.

The previous prime is 844424930131921. The next prime is 844424930131963. The reversal of 844424930131961 is 169131039424448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 831642875091961 + 12782055040000 = 28838219^2 + 3575200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-844424930131961 is a prime.

Together with 844424930131963, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 844424930131961.

It is not a weakly prime, because it can be changed into another prime (844424930131963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422212465065980 + 422212465065981.

It is an arithmetic number, because the mean of its divisors is an integer number (422212465065981).

Almost surely, 2^{844424930131961} is an apocalyptic number.

It is an amenable number.

844424930131961 is a deficient number, since it is larger than the sum of its proper divisors (1).

844424930131961 is an equidigital number, since it uses as much as digits as its factorization.

844424930131961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 59.

The spelling of 844424930131961 in words is "eight hundred forty-four trillion, four hundred twenty-four billion, nine hundred thirty million, one hundred thirty-one thousand, nine hundred sixty-one".