16696278378 has 24 divisors (see below), whose sum is σ = 38957983428. Its totient is φ = 5137316352.

The previous prime is 16696278343. The next prime is 16696278383. The reversal of 16696278378 is 87387269661.

It can be written as a sum of positive squares in 2 ways, for example, as 16586091369 + 110187009 = 128787^2 + 10497^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35675575 + ... + 35676042.

Almost surely, 2^16696278378 is an apocalyptic number.

16696278378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16696278378 is an abundant number, since it is smaller than the sum of its proper divisors (22261705050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16696278378 is a wasteful number, since it uses less digits than its factorization.

16696278378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71351638 (or 71351635 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 16696278378 in words is "sixteen billion, six hundred ninety-six million, two hundred seventy-eight thousand, three hundred seventy-eight".