848440396781 has 2 divisors, whose sum is σ = 848440396782. Its totient is φ = 848440396780.

The previous prime is 848440396777. The next prime is 848440396849. The reversal of 848440396781 is 187693044848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596671278025 + 251769118756 = 772445^2 + 501766^2 .

It is a cyclic number.

It is not a de Polignac number, because 848440396781 - 2² = 848440396777 is a prime.

It is a super-2 number, since 2×848440396781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (848440396751) 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, 424220198390 + 424220198391.

It is an arithmetic number, because the mean of its divisors is an integer number (424220198391).

Almost surely, 2^848440396781 is an apocalyptic number.

It is an amenable number.

848440396781 is a deficient number, since it is larger than the sum of its proper divisors (1).

848440396781 is an equidigital number, since it uses as much as digits as its factorization.

848440396781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37158912, while the sum is 62.

The spelling of 848440396781 in words is "eight hundred forty-eight billion, four hundred forty million, three hundred ninety-six thousand, seven hundred eighty-one".