86842556791 has 4 divisors (see below), whose sum is σ = 86846850232. Its totient is φ = 86838263352.

The previous prime is 86842556783. The next prime is 86842556803. The reversal of 86842556791 is 19765524868.

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 86842556791 - 2³ = 86842556783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86842550791) 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, 2116236 + ... + 2156881.

It is an arithmetic number, because the mean of its divisors is an integer number (21711712558).

Almost surely, 2^86842556791 is an apocalyptic number.

86842556791 is a deficient number, since it is larger than the sum of its proper divisors (4293441).

86842556791 is a wasteful number, since it uses less digits than its factorization.

86842556791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293440.

The product of its digits is 29030400, while the sum is 61.

The spelling of 86842556791 in words is "eighty-six billion, eight hundred forty-two million, five hundred fifty-six thousand, seven hundred ninety-one".