86541867854815 has 4 divisors (see below), whose sum is σ = 103850241425784. Its totient is φ = 69233494283848.

The previous prime is 86541867854803. The next prime is 86541867854843. The reversal of 86541867854815 is 51845876814568.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86541867854815 - 2⁹ = 86541867854303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8654186785477 + ... + 8654186785486.

It is an arithmetic number, because the mean of its divisors is an integer number (25962560356446).

Almost surely, 2^{86541867854815} is an apocalyptic number.

86541867854815 is a deficient number, since it is larger than the sum of its proper divisors (17308373570969).

86541867854815 is a wasteful number, since it uses less digits than its factorization.

86541867854815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17308373570968.

The product of its digits is 2064384000, while the sum is 76.

The spelling of 86541867854815 in words is "eighty-six trillion, five hundred forty-one billion, eight hundred sixty-seven million, eight hundred fifty-four thousand, eight hundred fifteen".