16661134545 has 32 divisors (see below), whose sum is σ = 29137221504. Its totient is φ = 8062579200.

The previous prime is 16661134531. The next prime is 16661134547. The reversal of 16661134545 is 54543116661.

16661134545 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 16661134545 - 2⁵ = 16661134513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16661134497 and 16661134506.

It is not an unprimeable number, because it can be changed into a prime (16661134547) 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 31 ways as a sum of consecutive naturals, for example, 10942 + ... + 182871.

It is an arithmetic number, because the mean of its divisors is an integer number (910538172).

Almost surely, 2^16661134545 is an apocalyptic number.

16661134545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16661134545 is a deficient number, since it is larger than the sum of its proper divisors (12476086959).

16661134545 is a wasteful number, since it uses less digits than its factorization.

16661134545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194353.

The product of its digits is 259200, while the sum is 42.

The spelling of 16661134545 in words is "sixteen billion, six hundred sixty-one million, one hundred thirty-four thousand, five hundred forty-five".