133688961805 has 16 divisors (see below), whose sum is σ = 189259213824. Its totient is φ = 88715255040.

The previous prime is 133688961761. The next prime is 133688961823. The reversal of 133688961805 is 508169886331.

It is not a de Polignac number, because 133688961805 - 2¹¹ = 133688959757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133688961805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61606732 + ... + 61608901.

It is an arithmetic number, because the mean of its divisors is an integer number (11828700864).

Almost surely, 2^133688961805 is an apocalyptic number.

It is an amenable number.

133688961805 is a deficient number, since it is larger than the sum of its proper divisors (55570252019).

133688961805 is a wasteful number, since it uses less digits than its factorization.

133688961805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123215676.

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 133688961805 in words is "one hundred thirty-three billion, six hundred eighty-eight million, nine hundred sixty-one thousand, eight hundred five".