133621330872 has 64 divisors (see below), whose sum is σ = 344897832960. Its totient is φ = 43095081600.

The previous prime is 133621330849. The next prime is 133621330901. The reversal of 133621330872 is 278033126331.

It is a self number, because there is not a number n which added to its sum of digits gives 133621330872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4488597 + ... + 4518267.

It is an arithmetic number, because the mean of its divisors is an integer number (5389028640).

Almost surely, 2^133621330872 is an apocalyptic number.

133621330872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133621330872 is an abundant number, since it is smaller than the sum of its proper divisors (211276502088).

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

133621330872 is a wasteful number, since it uses less digits than its factorization.

133621330872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35764 (or 35760 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 133621330872 in words is "one hundred thirty-three billion, six hundred twenty-one million, three hundred thirty thousand, eight hundred seventy-two".