264616509 has 16 divisors (see below), whose sum is σ = 373930560. Its totient is φ = 165876480.

The previous prime is 264616411. The next prime is 264616519. The reversal of 264616509 is 905616462.

It is not a de Polignac number, because 264616509 - 2⁷ = 264616381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264616519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76387 + ... + 79775.

It is an arithmetic number, because the mean of its divisors is an integer number (23370660).

Almost surely, 2^264616509 is an apocalyptic number.

It is an amenable number.

264616509 is a deficient number, since it is larger than the sum of its proper divisors (109314051).

264616509 is a wasteful number, since it uses less digits than its factorization.

264616509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 264616509 is about 16267.0374991884. The cubic root of 264616509 is about 642.0058398553.

The spelling of 264616509 in words is "two hundred sixty-four million, six hundred sixteen thousand, five hundred nine".