133544004540 has 96 divisors (see below), whose sum is σ = 384226913280. Its totient is φ = 34631421696.

The previous prime is 133544004511. The next prime is 133544004557. The reversal of 133544004540 is 45400445331.

It is a happy number.

It is a super-2 number, since 2×133544004540² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4609821 + ... + 4638699.

It is an arithmetic number, because the mean of its divisors is an integer number (4002363680).

Almost surely, 2^133544004540 is an apocalyptic number.

133544004540 is a gapful number since it is divisible by the number (10) 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 133544004540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192113456640).

133544004540 is an abundant number, since it is smaller than the sum of its proper divisors (250682908740).

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

133544004540 is a wasteful number, since it uses less digits than its factorization.

133544004540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31011 (or 31009 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 133544004540 its reverse (45400445331), we get a palindrome (178944449871).

The spelling of 133544004540 in words is "one hundred thirty-three billion, five hundred forty-four million, four thousand, five hundred forty".