16981453429 has 2 divisors, whose sum is σ = 16981453430. Its totient is φ = 16981453428.

The previous prime is 16981453421. The next prime is 16981453457. The reversal of 16981453429 is 92435418961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16711508529 + 269944900 = 129273^2 + 16430^2 .

It is a cyclic number.

It is not a de Polignac number, because 16981453429 - 2³ = 16981453421 is a prime.

It is a super-2 number, since 2×16981453429² (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 (16981453421) 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, 8490726714 + 8490726715.

It is an arithmetic number, because the mean of its divisors is an integer number (8490726715).

Almost surely, 2^16981453429 is an apocalyptic number.

It is an amenable number.

16981453429 is a deficient number, since it is larger than the sum of its proper divisors (1).

16981453429 is an equidigital number, since it uses as much as digits as its factorization.

16981453429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The spelling of 16981453429 in words is "sixteen billion, nine hundred eighty-one million, four hundred fifty-three thousand, four hundred twenty-nine".