16238133697 has 2 divisors, whose sum is σ = 16238133698. Its totient is φ = 16238133696.

The previous prime is 16238133679. The next prime is 16238133721. The reversal of 16238133697 is 79633183261.

Together with previous prime (16238133679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12488286001 + 3749847696 = 111751^2 + 61236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16238133697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16238133697.

It is not a weakly prime, because it can be changed into another prime (16238133677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8119066848 + 8119066849.

It is an arithmetic number, because the mean of its divisors is an integer number (8119066849).

Almost surely, 2^16238133697 is an apocalyptic number.

It is an amenable number.

16238133697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16238133697 is an equidigital number, since it uses as much as digits as its factorization.

16238133697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The spelling of 16238133697 in words is "sixteen billion, two hundred thirty-eight million, one hundred thirty-three thousand, six hundred ninety-seven".