133151016440 has 128 divisors (see below), whose sum is σ = 342782496000. Its totient is φ = 46185043968.

The previous prime is 133151016409. The next prime is 133151016443. The reversal of 133151016440 is 44610151331.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133151016443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438641 + ... + 677279.

It is an arithmetic number, because the mean of its divisors is an integer number (2677988250).

Almost surely, 2^133151016440 is an apocalyptic number.

133151016440 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 133151016440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171391248000).

133151016440 is an abundant number, since it is smaller than the sum of its proper divisors (209631479560).

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

133151016440 is a wasteful number, since it uses less digits than its factorization.

133151016440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238729 (or 238725 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 133151016440 its reverse (44610151331), we get a palindrome (177761167771).

The spelling of 133151016440 in words is "one hundred thirty-three billion, one hundred fifty-one million, sixteen thousand, four hundred forty".