86526527581 has 8 divisors (see below), whose sum is σ = 93281875064. Its totient is φ = 79785388800.

The previous prime is 86526527557. The next prime is 86526527599. The reversal of 86526527581 is 18572562568.

It can be written as a sum of positive squares in 4 ways, for example, as 125216100 + 86401311481 = 11190^2 + 293941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86526527581 - 2⁹ = 86526527069 is a prime.

It is a super-2 number, since 2×86526527581² (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 (86526327581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3539520 + ... + 3563881.

It is an arithmetic number, because the mean of its divisors is an integer number (11660234383).

Almost surely, 2^86526527581 is an apocalyptic number.

It is an amenable number.

86526527581 is a deficient number, since it is larger than the sum of its proper divisors (6755347483).

86526527581 is a wasteful number, since it uses less digits than its factorization.

86526527581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104351.

The product of its digits is 8064000, while the sum is 55.

The spelling of 86526527581 in words is "eighty-six billion, five hundred twenty-six million, five hundred twenty-seven thousand, five hundred eighty-one".