264764789809 has 9 divisors (see below), whose sum is σ = 286705211169. Its totient is φ = 244392092880.

The previous prime is 264764789789. The next prime is 264764789813. The reversal of 264764789809 is 908987467462.

It is a happy number.

The square root of 264764789809 is 514553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11224343025 + 253540446784 = 105945^2 + 503528^2 .

It is not a de Polignac number, because 264764789809 - 2¹¹ = 264764787761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (264764789899) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6669399 + ... + 6708979.

Almost surely, 2^264764789809 is an apocalyptic number.

264764789809 is the 514553-rd square number.

264764789809 is the 257277-th centered octagonal number.

It is an amenable number.

264764789809 is a deficient number, since it is larger than the sum of its proper divisors (21940421360).

264764789809 is an frugal number, since it uses more digits than its factorization.

264764789809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79188 (or 39594 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 70.

The spelling of 264764789809 in words is "two hundred sixty-four billion, seven hundred sixty-four million, seven hundred eighty-nine thousand, eight hundred nine".