133581661586855 has 8 divisors (see below), whose sum is σ = 160298056102464. Its totient is φ = 106865287804000.

The previous prime is 133581661586839. The next prime is 133581661586861. The reversal of 133581661586855 is 558685166185331.

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

It is not a de Polignac number, because 133581661586855 - 2⁴ = 133581661586839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21200705 + ... + 26770005.

It is an arithmetic number, because the mean of its divisors is an integer number (20037257012808).

Almost surely, 2^{133581661586855} is an apocalyptic number.

133581661586855 is a deficient number, since it is larger than the sum of its proper divisors (26716394515609).

133581661586855 is an equidigital number, since it uses as much as digits as its factorization.

133581661586855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366377.

The product of its digits is 622080000, while the sum is 71.

The spelling of 133581661586855 in words is "one hundred thirty-three trillion, five hundred eighty-one billion, six hundred sixty-one million, five hundred eighty-six thousand, eight hundred fifty-five".