16475378069 has 4 divisors (see below), whose sum is σ = 16500303660. Its totient is φ = 16450452480.

The previous prime is 16475377993. The next prime is 16475378071. The reversal of 16475378069 is 96087357461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14330484100 + 2144893969 = 119710^2 + 46313^2 .

It is a cyclic number.

It is not a de Polignac number, because 16475378069 - 2¹² = 16475373973 is a prime.

It is a super-2 number, since 2×16475378069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16475378369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12461804 + ... + 12463125.

It is an arithmetic number, because the mean of its divisors is an integer number (4125075915).

Almost surely, 2^16475378069 is an apocalyptic number.

It is an amenable number.

16475378069 is a deficient number, since it is larger than the sum of its proper divisors (24925591).

16475378069 is an equidigital number, since it uses as much as digits as its factorization.

16475378069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24925590.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 16475378069 in words is "sixteen billion, four hundred seventy-five million, three hundred seventy-eight thousand, sixty-nine".