133443431544 has 128 divisors (see below), whose sum is σ = 359611084800. Its totient is φ = 41143956480.

The previous prime is 133443431533. The next prime is 133443431581. The reversal of 133443431544 is 445134344331.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 35745102 + ... + 35748834.

It is an arithmetic number, because the mean of its divisors is an integer number (2809461600).

Almost surely, 2^133443431544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133443431544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179805542400).

133443431544 is an abundant number, since it is smaller than the sum of its proper divisors (226167653256).

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

133443431544 is a wasteful number, since it uses less digits than its factorization.

133443431544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885 (or 5881 counting only the distinct ones).

The product of its digits is 414720, while the sum is 39.

Adding to 133443431544 its reverse (445134344331), we get a palindrome (578577775875).

The spelling of 133443431544 in words is "one hundred thirty-three billion, four hundred forty-three million, four hundred thirty-one thousand, five hundred forty-four".