16638177069 has 12 divisors (see below), whose sum is σ = 25077832416. Its totient is φ = 10609851912.

The previous prime is 16638177037. The next prime is 16638177079. The reversal of 16638177069 is 96077183661.

It is a happy number.

It is not a de Polignac number, because 16638177069 - 2⁵ = 16638177037 is a prime.

It is a super-2 number, since 2×16638177069² (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 (16638177019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40188627 + ... + 40189040.

It is an arithmetic number, because the mean of its divisors is an integer number (2089819368).

Almost surely, 2^16638177069 is an apocalyptic number.

It is an amenable number.

16638177069 is a deficient number, since it is larger than the sum of its proper divisors (8439655347).

16638177069 is a wasteful number, since it uses less digits than its factorization.

16638177069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80377696 (or 80377693 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 16638177069 in words is "sixteen billion, six hundred thirty-eight million, one hundred seventy-seven thousand, sixty-nine".