133561936989887 has 8 divisors (see below), whose sum is σ = 155522255471136. Its totient is φ = 112321628950752.

The previous prime is 133561936989863. The next prime is 133561936989913. The reversal of 133561936989887 is 788989639165331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133561936989887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133561936989799 and 133561936989808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133561936989487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180002610128 + ... + 180002610869.

It is an arithmetic number, because the mean of its divisors is an integer number (19440281933892).

Almost surely, 2^{133561936989887} is an apocalyptic number.

133561936989887 is a deficient number, since it is larger than the sum of its proper divisors (21960318481249).

133561936989887 is an equidigital number, since it uses as much as digits as its factorization.

133561936989887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360005221057.

The product of its digits is 12697896960, while the sum is 86.

The spelling of 133561936989887 in words is "one hundred thirty-three trillion, five hundred sixty-one billion, nine hundred thirty-six million, nine hundred eighty-nine thousand, eight hundred eighty-seven".