18316681531667 has 2 divisors, whose sum is σ = 18316681531668. Its totient is φ = 18316681531666.

The previous prime is 18316681531663. The next prime is 18316681531747. The reversal of 18316681531667 is 76613518661381.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18316681531667 - 2² = 18316681531663 is a prime.

It is not a weakly prime, because it can be changed into another prime (18316681531663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9158340765833 + 9158340765834.

It is an arithmetic number, because the mean of its divisors is an integer number (9158340765834).

Almost surely, 2^{18316681531667} is an apocalyptic number.

18316681531667 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316681531667 is an equidigital number, since it uses as much as digits as its factorization.

18316681531667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 62.

The spelling of 18316681531667 in words is "eighteen trillion, three hundred sixteen billion, six hundred eighty-one million, five hundred thirty-one thousand, six hundred sixty-seven".