16861346687 has 2 divisors, whose sum is σ = 16861346688. Its totient is φ = 16861346686.

The previous prime is 16861346647. The next prime is 16861346693. The reversal of 16861346687 is 78664316861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16861346687 - 2¹² = 16861342591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16861346647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430673343 + 8430673344.

It is an arithmetic number, because the mean of its divisors is an integer number (8430673344).

Almost surely, 2^16861346687 is an apocalyptic number.

16861346687 is a deficient number, since it is larger than the sum of its proper divisors (1).

16861346687 is an equidigital number, since it uses as much as digits as its factorization.

16861346687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 56.

The spelling of 16861346687 in words is "sixteen billion, eight hundred sixty-one million, three hundred forty-six thousand, six hundred eighty-seven".