84274670581 has 2 divisors, whose sum is σ = 84274670582. Its totient is φ = 84274670580.

The previous prime is 84274670521. The next prime is 84274670617. The reversal of 84274670581 is 18507647248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68238500625 + 16036169956 = 261225^2 + 126634^2 .

It is a cyclic number.

It is not a de Polignac number, because 84274670581 - 2⁷ = 84274670453 is a prime.

It is a super-2 number, since 2×84274670581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84274670521) 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, 42137335290 + 42137335291.

It is an arithmetic number, because the mean of its divisors is an integer number (42137335291).

Almost surely, 2^84274670581 is an apocalyptic number.

It is an amenable number.

84274670581 is a deficient number, since it is larger than the sum of its proper divisors (1).

84274670581 is an equidigital number, since it uses as much as digits as its factorization.

84274670581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 84274670581 in words is "eighty-four billion, two hundred seventy-four million, six hundred seventy thousand, five hundred eighty-one".