133681801422 has 64 divisors (see below), whose sum is σ = 295433591040. Its totient is φ = 40064198400.

The previous prime is 133681801403. The next prime is 133681801427. The reversal of 133681801422 is 224108186331.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133681801427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1945797 + ... + 2013327.

It is an arithmetic number, because the mean of its divisors is an integer number (4616149860).

Almost surely, 2^133681801422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133681801422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147716795520).

133681801422 is an abundant number, since it is smaller than the sum of its proper divisors (161751789618).

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

133681801422 is a wasteful number, since it uses less digits than its factorization.

133681801422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68209.

The product of its (nonzero) digits is 55296, while the sum is 39.

Adding to 133681801422 its reverse (224108186331), we get a palindrome (357789987753).

The spelling of 133681801422 in words is "one hundred thirty-three billion, six hundred eighty-one million, eight hundred one thousand, four hundred twenty-two".