16773435121 has 4 divisors (see below), whose sum is σ = 16895869092. Its totient is φ = 16651001152.

The previous prime is 16773435113. The next prime is 16773435137. The reversal of 16773435121 is 12153437761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7968240225 + 8805194896 = 89265^2 + 93836^2 .

It is a cyclic number.

It is not a de Polignac number, because 16773435121 - 2³ = 16773435113 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16773435191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61216780 + ... + 61217053.

It is an arithmetic number, because the mean of its divisors is an integer number (4223967273).

Almost surely, 2^16773435121 is an apocalyptic number.

It is an amenable number.

16773435121 is a deficient number, since it is larger than the sum of its proper divisors (122433971).

16773435121 is a wasteful number, since it uses less digits than its factorization.

16773435121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122433970.

The product of its digits is 105840, while the sum is 40.

The spelling of 16773435121 in words is "sixteen billion, seven hundred seventy-three million, four hundred thirty-five thousand, one hundred twenty-one".