133855981056 has 400 divisors, whose sum is σ = 467262009984. Its totient is φ = 37351673856.

The previous prime is 133855980977. The next prime is 133855981069. The reversal of 133855981056 is 650189558331.

133855981056 is a `hidden beast` number, since 1 + 3 + 3 + 8 + 559 + 81 + 0 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 133855980993 and 133855981011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12477711 + ... + 12488433.

Almost surely, 2^133855981056 is an apocalyptic number.

133855981056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133855981056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233631004992).

133855981056 is an abundant number, since it is smaller than the sum of its proper divisors (333406028928).

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

133855981056 is an equidigital number, since it uses as much as digits as its factorization.

133855981056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10803 (or 10778 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 133855981056 in words is "one hundred thirty-three billion, eight hundred fifty-five million, nine hundred eighty-one thousand, fifty-six".