263663504256 has 32 divisors (see below), whose sum is σ = 700356184200. Its totient is φ = 87887834624.

The previous prime is 263663504239. The next prime is 263663504263. The reversal of 263663504256 is 652405366362.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×263663504256² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343311471 + ... + 343312238.

Almost surely, 2^263663504256 is an apocalyptic number.

It is an amenable number.

263663504256 is an abundant number, since it is smaller than the sum of its proper divisors (436692679944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263663504256 is an equidigital number, since it uses as much as digits as its factorization.

263663504256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686623726 (or 686623714 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 48.

The spelling of 263663504256 in words is "two hundred sixty-three billion, six hundred sixty-three million, five hundred four thousand, two hundred fifty-six".