16696278381 has 16 divisors (see below), whose sum is σ = 23245369344. Its totient is φ = 10639676784.

The previous prime is 16696278343. The next prime is 16696278383. The reversal of 16696278381 is 18387269661.

It is not a de Polignac number, because 16696278381 - 2⁶ = 16696278317 is a prime.

It is a super-2 number, since 2×16696278381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16696278383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21240 + ... + 183966.

It is an arithmetic number, because the mean of its divisors is an integer number (1452835584).

Almost surely, 2^16696278381 is an apocalyptic number.

It is an amenable number.

16696278381 is a deficient number, since it is larger than the sum of its proper divisors (6549090963).

16696278381 is a wasteful number, since it uses less digits than its factorization.

16696278381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164240.

The product of its digits is 5225472, while the sum is 57.

The spelling of 16696278381 in words is "sixteen billion, six hundred ninety-six million, two hundred seventy-eight thousand, three hundred eighty-one".