870643521801481 has 2 divisors, whose sum is σ = 870643521801482. Its totient is φ = 870643521801480.

The previous prime is 870643521801479. The next prime is 870643521801499. The reversal of 870643521801481 is 184108125346078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835413468390400 + 35230053411081 = 28903520^2 + 5935491^2 .

It is a cyclic number.

It is not a de Polignac number, because 870643521801481 - 2¹ = 870643521801479 is a prime.

It is a super-2 number, since 2×870643521801481² (a number of 31 digits) contains 22 as substring.

Together with 870643521801479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (870643521831481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435321760900740 + 435321760900741.

It is an arithmetic number, because the mean of its divisors is an integer number (435321760900741).

Almost surely, 2^{870643521801481} is an apocalyptic number.

It is an amenable number.

870643521801481 is a deficient number, since it is larger than the sum of its proper divisors (1).

870643521801481 is an equidigital number, since it uses as much as digits as its factorization.

870643521801481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 870643521801481 in words is "eight hundred seventy trillion, six hundred forty-three billion, five hundred twenty-one million, eight hundred one thousand, four hundred eighty-one".