263740563 has 32 divisors (see below), whose sum is σ = 409651200. Its totient is φ = 167384448.

The previous prime is 263740559. The next prime is 263740571. The reversal of 263740563 is 365047362.

263740563 is a `hidden beast` number, since 26 + 3 + 74 + 0 + 563 = 666.

It is not a de Polignac number, because 263740563 - 2² = 263740559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263740523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147531 + ... + 149307.

It is an arithmetic number, because the mean of its divisors is an integer number (12801600).

Almost surely, 2^263740563 is an apocalyptic number.

263740563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

263740563 is a deficient number, since it is larger than the sum of its proper divisors (145910637).

263740563 is a wasteful number, since it uses less digits than its factorization.

263740563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2042 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 263740563 is about 16240.0912251132. The cubic root of 263740563 is about 641.2966574580.

The spelling of 263740563 in words is "two hundred sixty-three million, seven hundred forty thousand, five hundred sixty-three".