86521006881 has 12 divisors (see below), whose sum is σ = 132326246052. Its totient is φ = 54287690496.

The previous prime is 86521006879. The next prime is 86521006903. The reversal of 86521006881 is 18860012568.

It can be written as a sum of positive squares in 2 ways, for example, as 37794859281 + 48726147600 = 194409^2 + 220740^2 .

It is not a de Polignac number, because 86521006881 - 2¹ = 86521006879 is a prime.

It is a super-2 number, since 2×86521006881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86521006801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282748236 + ... + 282748541.

It is an arithmetic number, because the mean of its divisors is an integer number (11027187171).

Almost surely, 2^86521006881 is an apocalyptic number.

It is an amenable number.

86521006881 is a deficient number, since it is larger than the sum of its proper divisors (45805239171).

86521006881 is a wasteful number, since it uses less digits than its factorization.

86521006881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565496800 (or 565496797 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 86521006881 in words is "eighty-six billion, five hundred twenty-one million, six thousand, eight hundred eighty-one".