86936813865 has 64 divisors (see below), whose sum is σ = 169998508800. Its totient is φ = 42151095360.

The previous prime is 86936813863. The next prime is 86936813869. The reversal of 86936813865 is 56831863968.

86936813865 is a `hidden beast` number, since 86 + 9 + 368 + 138 + 65 = 666.

It is not a de Polignac number, because 86936813865 - 2¹ = 86936813863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86936813863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62230 + ... + 421599.

It is an arithmetic number, because the mean of its divisors is an integer number (2656226700).

Almost surely, 2^86936813865 is an apocalyptic number.

It is an amenable number.

86936813865 is a deficient number, since it is larger than the sum of its proper divisors (83061694935).

86936813865 is a wasteful number, since it uses less digits than its factorization.

86936813865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483876 (or 483848 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 86936813865 in words is "eighty-six billion, nine hundred thirty-six million, eight hundred thirteen thousand, eight hundred sixty-five".