86885665809 has 4 divisors (see below), whose sum is σ = 115847554416. Its totient is φ = 57923777204.

The previous prime is 86885665787. The next prime is 86885665819. The reversal of 86885665809 is 90856658868.

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.

It is a cyclic number.

It is not a de Polignac number, because 86885665809 - 2¹⁶ = 86885600273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86885665819) 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, 14480944299 + ... + 14480944304.

It is an arithmetic number, because the mean of its divisors is an integer number (28961888604).

Almost surely, 2^86885665809 is an apocalyptic number.

It is an amenable number.

86885665809 is a deficient number, since it is larger than the sum of its proper divisors (28961888607).

86885665809 is a wasteful number, since it uses less digits than its factorization.

86885665809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28961888606.

The product of its (nonzero) digits is 199065600, while the sum is 69.

The spelling of 86885665809 in words is "eighty-six billion, eight hundred eighty-five million, six hundred sixty-five thousand, eight hundred nine".