16236331640729 has 2 divisors, whose sum is σ = 16236331640730. Its totient is φ = 16236331640728.

The previous prime is 16236331640693. The next prime is 16236331640761. The reversal of 16236331640729 is 92704613363261.

It is a happy number.

16236331640729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10402044048400 + 5834287592329 = 3225220^2 + 2415427^2 .

It is a cyclic number.

It is not a de Polignac number, because 16236331640729 - 2⁴⁰ = 15136820012953 is a prime.

It is a super-2 number, since 2×16236331640729² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16236331640779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8118165820364 + 8118165820365.

It is an arithmetic number, because the mean of its divisors is an integer number (8118165820365).

Almost surely, 2^{16236331640729} is an apocalyptic number.

It is an amenable number.

16236331640729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16236331640729 is an equidigital number, since it uses as much as digits as its factorization.

16236331640729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 53.

The spelling of 16236331640729 in words is "sixteen trillion, two hundred thirty-six billion, three hundred thirty-one million, six hundred forty thousand, seven hundred twenty-nine".