87323666918 has 4 divisors (see below), whose sum is σ = 130985500380. Its totient is φ = 43661833458.

The previous prime is 87323666917. The next prime is 87323666923. The reversal of 87323666918 is 81966632378.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87323666917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21830916728 + ... + 21830916731.

It is an arithmetic number, because the mean of its divisors is an integer number (32746375095).

Almost surely, 2^87323666918 is an apocalyptic number.

87323666918 is a deficient number, since it is larger than the sum of its proper divisors (43661833462).

87323666918 is a wasteful number, since it uses less digits than its factorization.

87323666918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43661833461.

The product of its digits is 15676416, while the sum is 59.

The spelling of 87323666918 in words is "eighty-seven billion, three hundred twenty-three million, six hundred sixty-six thousand, nine hundred eighteen".