16238420669 has 2 divisors, whose sum is σ = 16238420670. Its totient is φ = 16238420668.

The previous prime is 16238420657. The next prime is 16238420749. The reversal of 16238420669 is 96602483261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15673788025 + 564632644 = 125195^2 + 23762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16238420669 is a prime.

It is a super-2 number, since 2×16238420669² (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 (16238420609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8119210334 + 8119210335.

It is an arithmetic number, because the mean of its divisors is an integer number (8119210335).

Almost surely, 2^16238420669 is an apocalyptic number.

It is an amenable number.

16238420669 is a deficient number, since it is larger than the sum of its proper divisors (1).

16238420669 is an equidigital number, since it uses as much as digits as its factorization.

16238420669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 16238420669 in words is "sixteen billion, two hundred thirty-eight million, four hundred twenty thousand, six hundred sixty-nine".