86173661771 has 4 divisors (see below), whose sum is σ = 88953457344. Its totient is φ = 83393866200.

The previous prime is 86173661767. The next prime is 86173661797. The reversal of 86173661771 is 17716637168.

It is a happy number.

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 86173661771 - 2² = 86173661767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86173661711) 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, 1389897740 + ... + 1389897801.

It is an arithmetic number, because the mean of its divisors is an integer number (22238364336).

Almost surely, 2^86173661771 is an apocalyptic number.

86173661771 is a deficient number, since it is larger than the sum of its proper divisors (2779795573).

86173661771 is a wasteful number, since it uses less digits than its factorization.

86173661771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779795572.

The product of its digits is 1778112, while the sum is 53.

The spelling of 86173661771 in words is "eighty-six billion, one hundred seventy-three million, six hundred sixty-one thousand, seven hundred seventy-one".