781453133256 has 32 divisors (see below), whose sum is σ = 2068552412640. Its totient is φ = 245161767168.

The previous prime is 781453133203. The next prime is 781453133257. The reversal of 781453133256 is 652331354187.

781453133256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781453133256² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781453133257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957662746 + ... + 957663561.

It is an arithmetic number, because the mean of its divisors is an integer number (64642262895).

Almost surely, 2^781453133256 is an apocalyptic number.

It is an amenable number.

781453133256 is an abundant number, since it is smaller than the sum of its proper divisors (1287099279384).

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

781453133256 is a wasteful number, since it uses less digits than its factorization.

781453133256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915326333 (or 1915326329 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 48.

The spelling of 781453133256 in words is "seven hundred eighty-one billion, four hundred fifty-three million, one hundred thirty-three thousand, two hundred fifty-six".