16761320807641 has 2 divisors, whose sum is σ = 16761320807642. Its totient is φ = 16761320807640.

The previous prime is 16761320807603. The next prime is 16761320807677. The reversal of 16761320807641 is 14670802316761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15203729446416 + 1557591361225 = 3899196^2 + 1248035^2 .

It is a cyclic number.

It is not a de Polignac number, because 16761320807641 - 2⁷ = 16761320807513 is a prime.

It is not a weakly prime, because it can be changed into another prime (16761320807141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8380660403820 + 8380660403821.

It is an arithmetic number, because the mean of its divisors is an integer number (8380660403821).

Almost surely, 2^{16761320807641} is an apocalyptic number.

It is an amenable number.

16761320807641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16761320807641 is an equidigital number, since it uses as much as digits as its factorization.

16761320807641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 16761320807641 in words is "sixteen trillion, seven hundred sixty-one billion, three hundred twenty million, eight hundred seven thousand, six hundred forty-one".