844381200977 has 2 divisors, whose sum is σ = 844381200978. Its totient is φ = 844381200976.

The previous prime is 844381200931. The next prime is 844381200997. The reversal of 844381200977 is 779002183448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504837249361 + 339543951616 = 710519^2 + 582704^2 .

It is a cyclic number.

It is not a de Polignac number, because 844381200977 - 2¹² = 844381196881 is a prime.

It is a super-2 number, since 2×844381200977² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (844381200997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422190600488 + 422190600489.

It is an arithmetic number, because the mean of its divisors is an integer number (422190600489).

Almost surely, 2^844381200977 is an apocalyptic number.

It is an amenable number.

844381200977 is a deficient number, since it is larger than the sum of its proper divisors (1).

844381200977 is an equidigital number, since it uses as much as digits as its factorization.

844381200977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 844381200977 in words is "eight hundred forty-four billion, three hundred eighty-one million, two hundred thousand, nine hundred seventy-seven".