16348930781 has 2 divisors, whose sum is σ = 16348930782. Its totient is φ = 16348930780.

The previous prime is 16348930709. The next prime is 16348930823. The reversal of 16348930781 is 18703984361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11203164025 + 5145766756 = 105845^2 + 71734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16348930781 is a prime.

It is a super-2 number, since 2×16348930781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16348930681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8174465390 + 8174465391.

It is an arithmetic number, because the mean of its divisors is an integer number (8174465391).

Almost surely, 2^16348930781 is an apocalyptic number.

It is an amenable number.

16348930781 is a deficient number, since it is larger than the sum of its proper divisors (1).

16348930781 is an equidigital number, since it uses as much as digits as its factorization.

16348930781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 16348930781 in words is "sixteen billion, three hundred forty-eight million, nine hundred thirty thousand, seven hundred eighty-one".