264773645 has 18 divisors (see below), whose sum is σ = 336208878. Its totient is φ = 200146608.

The previous prime is 264773627. The next prime is 264773647. The reversal of 264773645 is 546377462.

It can be written as a sum of positive squares in only one way, i.e., 211818916 + 52954729 = 14554^2 + 7277^2 .

It is not a de Polignac number, because 264773645 - 2¹⁴ = 264757261 is a prime.

It is a super-3 number, since 3×264773645³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 264773596 and 264773605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264773647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 691124 + ... + 691506.

It is an arithmetic number, because the mean of its divisors is an integer number (18678271).

Almost surely, 2^264773645 is an apocalyptic number.

It is an amenable number.

264773645 is a deficient number, since it is larger than the sum of its proper divisors (71435233).

264773645 is an frugal number, since it uses more digits than its factorization.

264773645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 407 counting only the distinct ones).

The product of its digits is 846720, while the sum is 44.

The square root of 264773645 is about 16271.8666722660. The cubic root of 264773645 is about 642.1328944972.

The spelling of 264773645 in words is "two hundred sixty-four million, seven hundred seventy-three thousand, six hundred forty-five".