16475378369 has 2 divisors, whose sum is σ = 16475378370. Its totient is φ = 16475378368.

The previous prime is 16475378333. The next prime is 16475378371. The reversal of 16475378369 is 96387357461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9626160769 + 6849217600 = 98113^2 + 82760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16475378369 is a prime.

It is a super-2 number, since 2×16475378369² (a number of 21 digits) contains 22 as substring.

Together with 16475378371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16475378329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8237689184 + 8237689185.

It is an arithmetic number, because the mean of its divisors is an integer number (8237689185).

Almost surely, 2^16475378369 is an apocalyptic number.

It is an amenable number.

16475378369 is a deficient number, since it is larger than the sum of its proper divisors (1).

16475378369 is an equidigital number, since it uses as much as digits as its factorization.

16475378369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 59.

The spelling of 16475378369 in words is "sixteen billion, four hundred seventy-five million, three hundred seventy-eight thousand, three hundred sixty-nine".