86857774081 has 4 divisors (see below), whose sum is σ = 93539141332. Its totient is φ = 80176406832.

The previous prime is 86857774063. The next prime is 86857774121. The reversal of 86857774081 is 18047775868.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24864243856 + 61993530225 = 157684^2 + 248985^2 .

It is a cyclic number.

It is not a de Polignac number, because 86857774081 - 2¹⁹ = 86857249793 is a prime.

It is a super-2 number, since 2×86857774081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86857774051) 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, 3340683606 + ... + 3340683631.

It is an arithmetic number, because the mean of its divisors is an integer number (23384785333).

Almost surely, 2^86857774081 is an apocalyptic number.

It is an amenable number.

86857774081 is a deficient number, since it is larger than the sum of its proper divisors (6681367251).

86857774081 is a wasteful number, since it uses less digits than its factorization.

86857774081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681367250.

The product of its (nonzero) digits is 21073920, while the sum is 61.

The spelling of 86857774081 in words is "eighty-six billion, eight hundred fifty-seven million, seven hundred seventy-four thousand, eighty-one".