263486688256 has 66 divisors (see below), whose sum is σ = 578952641540. Its totient is φ = 119766620160.

The previous prime is 263486688251. The next prime is 263486688263. The reversal of 263486688256 is 652886684362.

263486688256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×263486688256² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (263486688251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 939366 + ... + 1187173.

Almost surely, 2^263486688256 is an apocalyptic number.

It is an amenable number.

263486688256 is an abundant number, since it is smaller than the sum of its proper divisors (315465953284).

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

263486688256 is a wasteful number, since it uses less digits than its factorization.

263486688256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126581 (or 2126552 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 64.

The spelling of 263486688256 in words is "two hundred sixty-three billion, four hundred eighty-six million, six hundred eighty-eight thousand, two hundred fifty-six".