133398796644 has 135 divisors (see below), whose sum is σ = 353946046377. Its totient is φ = 43811028576.

The previous prime is 133398796637. The next prime is 133398796673. The reversal of 133398796644 is 446697893331.

The square root of 133398796644 is 365238.

It is a perfect power (a square), and thus also a powerful number.

133398796644 is a `hidden beast` number, since 133 + 398 + 79 + 6 + 6 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 130703940900 + 2694855744 = 361530^2 + 51912^2 .

It is an unprimeable number.

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 44 ways as a sum of consecutive naturals, for example, 677151154 + ... + 677151350.

Almost surely, 2^133398796644 is an apocalyptic number.

133398796644 is the 365238-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133398796644

133398796644 is an abundant number, since it is smaller than the sum of its proper divisors (220547249733).

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

133398796644 is an equidigital number, since it uses as much as digits as its factorization.

133398796644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 305 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 133398796644 in words is "one hundred thirty-three billion, three hundred ninety-eight million, seven hundred ninety-six thousand, six hundred forty-four".