16430767645681 has 2 divisors, whose sum is σ = 16430767645682. Its totient is φ = 16430767645680.

The previous prime is 16430767645667. The next prime is 16430767645723. The reversal of 16430767645681 is 18654676703461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16205584179456 + 225183466225 = 4025616^2 + 474535^2 .

It is a cyclic number.

It is not a de Polignac number, because 16430767645681 - 2⁷ = 16430767645553 is a prime.

It is a super-2 number, since 2×16430767645681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16430767645651) 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, 8215383822840 + 8215383822841.

It is an arithmetic number, because the mean of its divisors is an integer number (8215383822841).

Almost surely, 2^{16430767645681} is an apocalyptic number.

It is an amenable number.

16430767645681 is a deficient number, since it is larger than the sum of its proper divisors (1).

16430767645681 is an equidigital number, since it uses as much as digits as its factorization.

16430767645681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121927680, while the sum is 64.

The spelling of 16430767645681 in words is "sixteen trillion, four hundred thirty billion, seven hundred sixty-seven million, six hundred forty-five thousand, six hundred eighty-one".