16468750681 has 2 divisors, whose sum is σ = 16468750682. Its totient is φ = 16468750680.

The previous prime is 16468750633. The next prime is 16468750691. The reversal of 16468750681 is 18605786461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13859175625 + 2609575056 = 117725^2 + 51084^2 .

It is a cyclic number.

It is not a de Polignac number, because 16468750681 - 2¹³ = 16468742489 is a prime.

It is a super-2 number, since 2×16468750681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16468750691) 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, 8234375340 + 8234375341.

It is an arithmetic number, because the mean of its divisors is an integer number (8234375341).

Almost surely, 2^16468750681 is an apocalyptic number.

It is an amenable number.

16468750681 is a deficient number, since it is larger than the sum of its proper divisors (1).

16468750681 is an equidigital number, since it uses as much as digits as its factorization.

16468750681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 16468750681 in words is "sixteen billion, four hundred sixty-eight million, seven hundred fifty thousand, six hundred eighty-one".