263915430529 has 3 divisors (see below), whose sum is σ = 263915944257. Its totient is φ = 263914916802.

The previous prime is 263915430503. The next prime is 263915430577. The reversal of 263915430529 is 925034519362.

It is a happy number.

The square root of 263915430529 is 513727.

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

263915430529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 263915430529 - 2¹⁷ = 263915299457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263915430829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 256864 + ... + 770590.

It is an arithmetic number, because the mean of its divisors is an integer number (87971981419).

Almost surely, 2^263915430529 is an apocalyptic number.

263915430529 is the 513727-th square number.

263915430529 is the 256864-th centered octagonal number.

It is an amenable number.

263915430529 is a deficient number, since it is larger than the sum of its proper divisors (513728).

263915430529 is an frugal number, since it uses more digits than its factorization.

263915430529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027454 (or 513727 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 49.

Multiplying 263915430529 by its sum of digits (49), we get a square (12931856095921 = 3596089²).

The spelling of 263915430529 in words is "two hundred sixty-three billion, nine hundred fifteen million, four hundred thirty thousand, five hundred twenty-nine".