16235138813 has 2 divisors, whose sum is σ = 16235138814. Its totient is φ = 16235138812.

The previous prime is 16235138807. The next prime is 16235138861. The reversal of 16235138813 is 31883153261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8135498809 + 8099640004 = 90197^2 + 89998^2 .

It is a cyclic number.

It is not a de Polignac number, because 16235138813 - 2⁴ = 16235138797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16235138113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8117569406 + 8117569407.

It is an arithmetic number, because the mean of its divisors is an integer number (8117569407).

Almost surely, 2^16235138813 is an apocalyptic number.

It is an amenable number.

16235138813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16235138813 is an equidigital number, since it uses as much as digits as its factorization.

16235138813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The spelling of 16235138813 in words is "sixteen billion, two hundred thirty-five million, one hundred thirty-eight thousand, eight hundred thirteen".