86115447785871 has 18 divisors (see below), whose sum is σ = 144697385055912. Its totient is φ = 49208827305960.

The previous prime is 86115447785869. The next prime is 86115447785923. The reversal of 86115447785871 is 17858774451168.

86115447785871 is a `hidden beast` number, since 8 + 6 + 1 + 1 + 5 + 4 + 477 + 85 + 8 + 71 = 666.

It is not a de Polignac number, because 86115447785871 - 2¹ = 86115447785869 is a prime.

It is a super-2 number, since 2×86115447785871² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86115447785871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86115447780871) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 97636561675 + ... + 97636562556.

Almost surely, 2^{86115447785871} is an apocalyptic number.

86115447785871 is a deficient number, since it is larger than the sum of its proper divisors (58581937270041).

86115447785871 is a wasteful number, since it uses less digits than its factorization.

86115447785871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195273124251 (or 195273124241 counting only the distinct ones).

The product of its digits is 421478400, while the sum is 72.

The spelling of 86115447785871 in words is "eighty-six trillion, one hundred fifteen billion, four hundred forty-seven million, seven hundred eighty-five thousand, eight hundred seventy-one".