133581147366 has 32 divisors (see below), whose sum is σ = 271782604800. Its totient is φ = 43763551776.

The previous prime is 133581147361. The next prime is 133581147383. The reversal of 133581147366 is 663741185331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133581147361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737641 + ... + 900708.

It is an arithmetic number, because the mean of its divisors is an integer number (8493206400).

Almost surely, 2^133581147366 is an apocalyptic number.

133581147366 is an abundant number, since it is smaller than the sum of its proper divisors (138201457434).

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

133581147366 is a wasteful number, since it uses less digits than its factorization.

133581147366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638588.

The product of its digits is 1088640, while the sum is 48.

The spelling of 133581147366 in words is "one hundred thirty-three billion, five hundred eighty-one million, one hundred forty-seven thousand, three hundred sixty-six".