133581661586864 has 40 divisors (see below), whose sum is σ = 258965348585472. Its totient is φ = 66751904036160.

The previous prime is 133581661586861. The next prime is 133581661586887. The reversal of 133581661586864 is 468685166185331.

It is not an unprimeable number, because it can be changed into a prime (133581661586861) by changing a digit.

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, 220081079 + ... + 220687209.

Almost surely, 2^{133581661586864} is an apocalyptic number.

It is an amenable number.

133581661586864 is a deficient number, since it is larger than the sum of its proper divisors (125383686998608).

133581661586864 is a wasteful number, since it uses less digits than its factorization.

133581661586864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614145 (or 614139 counting only the distinct ones).

The product of its digits is 597196800, while the sum is 71.

The spelling of 133581661586864 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 sixty-four".