16764945 has 16 divisors (see below), whose sum is σ = 26967552. Its totient is φ = 8893440.

The previous prime is 16764901. The next prime is 16764949. The reversal of 16764945 is 54946761.

16764945 is a nontrivial binomial coefficient, being equal to C(5791, 2).

It is not a de Polignac number, because 16764945 - 2⁷ = 16764817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16764897 and 16764906.

It is not an unprimeable number, because it can be changed into a prime (16764949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 5790.

It is an arithmetic number, because the mean of its divisors is an integer number (1685472).

Almost surely, 2^16764945 is an apocalyptic number.

16764945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16764945 is the 5790-th triangular number.

It is an amenable number.

16764945 is a deficient number, since it is larger than the sum of its proper divisors (10202607).

16764945 is a wasteful number, since it uses less digits than its factorization.

16764945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5992.

The product of its digits is 181440, while the sum is 42.

The square root of 16764945 is about 4094.5018011963. The cubic root of 16764945 is about 255.9375712437.

The spelling of 16764945 in words is "sixteen million, seven hundred sixty-four thousand, nine hundred forty-five".