86861817685138 has 16 divisors (see below), whose sum is σ = 131054964659136. Its totient is φ = 43176864335440.

The previous prime is 86861817685129. The next prime is 86861817685147. The reversal of 86861817685138 is 83158671816868.

It is an interprime number because it is at equal distance from previous prime (86861817685129) and next prime (86861817685147).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3724006 + ... + 13696417.

It is an arithmetic number, because the mean of its divisors is an integer number (8190935291196).

Almost surely, 2^{86861817685138} is an apocalyptic number.

86861817685138 is a deficient number, since it is larger than the sum of its proper divisors (44193146973998).

86861817685138 is a wasteful number, since it uses less digits than its factorization.

86861817685138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17435009.

The product of its digits is 743178240, while the sum is 76.

The spelling of 86861817685138 in words is "eighty-six trillion, eight hundred sixty-one billion, eight hundred seventeen million, six hundred eighty-five thousand, one hundred thirty-eight".