133561936989798 has 16 divisors (see below), whose sum is σ = 281183025241920. Its totient is φ = 42177453786216.

The previous prime is 133561936989769. The next prime is 133561936989853. The reversal of 133561936989798 is 897989639165331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585797969140 + ... + 585797969367.

It is an arithmetic number, because the mean of its divisors is an integer number (17573939077620).

Almost surely, 2^{133561936989798} is an apocalyptic number.

133561936989798 is an abundant number, since it is smaller than the sum of its proper divisors (147621088252122).

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

133561936989798 is a wasteful number, since it uses less digits than its factorization.

133561936989798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171595938531.

The product of its digits is 14285134080, while the sum is 87.

The spelling of 133561936989798 in words is "one hundred thirty-three trillion, five hundred sixty-one billion, nine hundred thirty-six million, nine hundred eighty-nine thousand, seven hundred ninety-eight".