263833240609 has 9 divisors (see below), whose sum is σ = 265108575603. Its totient is φ = 262564018872.

The previous prime is 263833240523. The next prime is 263833240631. The reversal of 263833240609 is 906042338362.

The square root of 263833240609 is 513647.

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

It can be written as a sum of positive squares in only one way, i.e., 245721464209 + 18111776400 = 495703^2 + 134580^2 .

It is not a de Polignac number, because 263833240609 - 2¹³ = 263833232417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263833240639) 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, 117624042 + ... + 117626284.

Almost surely, 2^263833240609 is an apocalyptic number.

263833240609 is the 513647-th square number.

263833240609 is the 256824-th centered octagonal number.

It is an amenable number.

263833240609 is a deficient number, since it is larger than the sum of its proper divisors (1275334994).

263833240609 is an frugal number, since it uses more digits than its factorization.

263833240609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 263833240609 in words is "two hundred sixty-three billion, eight hundred thirty-three million, two hundred forty thousand, six hundred nine".