16173687688 has 8 divisors (see below), whose sum is σ = 30325664430. Its totient is φ = 8086843840.

The previous prime is 16173687631. The next prime is 16173687703. The reversal of 16173687688 is 88678637161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12100440004 + 4073247684 = 110002^2 + 63822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010855473 + ... + 1010855488.

Almost surely, 2^16173687688 is an apocalyptic number.

It is an amenable number.

16173687688 is a deficient number, since it is larger than the sum of its proper divisors (14151976742).

16173687688 is a wasteful number, since it uses less digits than its factorization.

16173687688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021710967 (or 2021710963 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 61.

The spelling of 16173687688 in words is "sixteen billion, one hundred seventy-three million, six hundred eighty-seven thousand, six hundred eighty-eight".