133331897808 has 120 divisors (see below), whose sum is σ = 375829740000. Its totient is φ = 44125062912.

The previous prime is 133331897807. The next prime is 133331897827. The reversal of 133331897808 is 808798133331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133331897807) 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 23 ways as a sum of consecutive naturals, for example, 14150923 + ... + 14160341.

It is an arithmetic number, because the mean of its divisors is an integer number (3131914500).

Almost surely, 2^133331897808 is an apocalyptic number.

133331897808 is a gapful number since it is divisible by the number (18) 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 133331897808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187914870000).

133331897808 is an abundant number, since it is smaller than the sum of its proper divisors (242497842192).

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

133331897808 is a wasteful number, since it uses less digits than its factorization.

133331897808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10129 (or 10120 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 133331897808 in words is "one hundred thirty-three billion, three hundred thirty-one million, eight hundred ninety-seven thousand, eight hundred eight".