86176961971 has 4 divisors (see below), whose sum is σ = 87463185352. Its totient is φ = 84890738592.

The previous prime is 86176961957. The next prime is 86176961993. The reversal of 86176961971 is 17916967168.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86176961971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86176961911) 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, 643111590 + ... + 643111723.

It is an arithmetic number, because the mean of its divisors is an integer number (21865796338).

Almost surely, 2^86176961971 is an apocalyptic number.

86176961971 is a deficient number, since it is larger than the sum of its proper divisors (1286223381).

86176961971 is a wasteful number, since it uses less digits than its factorization.

86176961971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286223380.

The product of its digits is 6858432, while the sum is 61.

The spelling of 86176961971 in words is "eighty-six billion, one hundred seventy-six million, nine hundred sixty-one thousand, nine hundred seventy-one".