84116335581 has 24 divisors (see below), whose sum is σ = 126505262520. Its totient is φ = 53812915200.

The previous prime is 84116335579. The next prime is 84116335627. The reversal of 84116335581 is 18553361148.

84116335581 is a `hidden beast` number, since 8 + 4 + 1 + 1 + 63 + 3 + 5 + 581 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 50552100 + 84065783481 = 7110^2 + 289941^2 .

It is not a de Polignac number, because 84116335581 - 2¹ = 84116335579 is a prime.

It is a super-2 number, since 2×84116335581² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84116335531) 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 in 23 ways as a sum of consecutive naturals, for example, 1845996 + ... + 1891013.

It is an arithmetic number, because the mean of its divisors is an integer number (5271052605).

Almost surely, 2^84116335581 is an apocalyptic number.

It is an amenable number.

84116335581 is a deficient number, since it is larger than the sum of its proper divisors (42388926939).

84116335581 is a wasteful number, since it uses less digits than its factorization.

84116335581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737117 (or 3737114 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 84116335581 in words is "eighty-four billion, one hundred sixteen million, three hundred thirty-five thousand, five hundred eighty-one".