16688654475 has 24 divisors (see below), whose sum is σ = 27609868272. Its totient is φ = 8894822400.

The previous prime is 16688654471. The next prime is 16688654501. The reversal of 16688654475 is 57445688661.

It is a happy number.

16688654475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16688654475 - 2² = 16688654471 is a prime.

It is a super-2 number, since 2×16688654475² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16688654471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44835 + ... + 188115.

It is an arithmetic number, because the mean of its divisors is an integer number (1150411178).

Almost surely, 2^16688654475 is an apocalyptic number.

16688654475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16688654475 is a deficient number, since it is larger than the sum of its proper divisors (10921213797).

16688654475 is a wasteful number, since it uses less digits than its factorization.

16688654475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144847 (or 144842 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 60.

The spelling of 16688654475 in words is "sixteen billion, six hundred eighty-eight million, six hundred fifty-four thousand, four hundred seventy-five".