263499475684 has 9 divisors (see below), whose sum is σ = 461125879081. Its totient is φ = 131749224520.

The previous prime is 263499475637. The next prime is 263499475699. The reversal of 263499475684 is 486574994362.

The square root of 263499475684 is 513322.

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

263499475684 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 260939115684 + 2560360000 = 510822^2 + 50600^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 898314 + ... + 1154974.

Almost surely, 2^263499475684 is an apocalyptic number.

263499475684 is the 513322-nd square number.

It is an amenable number.

263499475684 is a deficient number, since it is larger than the sum of its proper divisors (197626403397).

263499475684 is an frugal number, since it uses more digits than its factorization.

263499475684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513326 (or 256663 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 67.

The spelling of 263499475684 in words is "two hundred sixty-three billion, four hundred ninety-nine million, four hundred seventy-five thousand, six hundred eighty-four".