86834520557 has 4 divisors (see below), whose sum is σ = 86936320380. Its totient is φ = 86732720736.

The previous prime is 86834520503. The next prime is 86834520581. The reversal of 86834520557 is 75502543868.

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 22814894116 + 64019626441 = 151046^2 + 253021^2 .

It is a cyclic number.

It is not a de Polignac number, because 86834520557 - 2⁸ = 86834520301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86834520499 and 86834520508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86834520257) 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, 50898632 + ... + 50900337.

It is an arithmetic number, because the mean of its divisors is an integer number (21734080095).

Almost surely, 2^86834520557 is an apocalyptic number.

It is an amenable number.

86834520557 is a deficient number, since it is larger than the sum of its proper divisors (101799823).

86834520557 is a wasteful number, since it uses less digits than its factorization.

86834520557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101799822.

The product of its (nonzero) digits is 8064000, while the sum is 53.

The spelling of 86834520557 in words is "eighty-six billion, eight hundred thirty-four million, five hundred twenty thousand, five hundred fifty-seven".