84840095581 has 4 divisors (see below), whose sum is σ = 84840956064. Its totient is φ = 84839235100.

The previous prime is 84840095563. The next prime is 84840095633. The reversal of 84840095581 is 18559004848.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 84840095581 - 2⁹ = 84840095069 is a prime.

It is a super-2 number, since 2×84840095581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84840095521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259855 + ... + 487036.

It is an arithmetic number, because the mean of its divisors is an integer number (21210239016).

Almost surely, 2^84840095581 is an apocalyptic number.

It is an amenable number.

84840095581 is a deficient number, since it is larger than the sum of its proper divisors (860483).

84840095581 is a wasteful number, since it uses less digits than its factorization.

84840095581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860482.

The product of its (nonzero) digits is 1843200, while the sum is 52.

The spelling of 84840095581 in words is "eighty-four billion, eight hundred forty million, ninety-five thousand, five hundred eighty-one".