16765133423661 has 64 divisors (see below), whose sum is σ = 30420088320000. Its totient is φ = 8915887556928.

The previous prime is 16765133423659. The next prime is 16765133423671. The reversal of 16765133423661 is 16632433156761.

16765133423661 is a `hidden beast` number, since 1 + 6 + 7 + 6 + 513 + 34 + 2 + 36 + 61 = 666.

It is not a de Polignac number, because 16765133423661 - 2¹ = 16765133423659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16765133423598 and 16765133423607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16765133423671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51956911 + ... + 52278588.

It is an arithmetic number, because the mean of its divisors is an integer number (475313880000).

Almost surely, 2^{16765133423661} is an apocalyptic number.

It is an amenable number.

16765133423661 is a deficient number, since it is larger than the sum of its proper divisors (13654954896339).

16765133423661 is a wasteful number, since it uses less digits than its factorization.

16765133423661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104235575 (or 104235569 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 16765133423661 in words is "sixteen trillion, seven hundred sixty-five billion, one hundred thirty-three million, four hundred twenty-three thousand, six hundred sixty-one".