133681608726 has 16 divisors (see below), whose sum is σ = 268908671664. Its totient is φ = 44302960544.

The previous prime is 133681608707. The next prime is 133681608727. The reversal of 133681608726 is 627806186331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133681608727) 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, 64392801 + ... + 64394876.

It is an arithmetic number, because the mean of its divisors is an integer number (16806791979).

Almost surely, 2^133681608726 is an apocalyptic number.

133681608726 is an abundant number, since it is smaller than the sum of its proper divisors (135227062938).

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

133681608726 is a wasteful number, since it uses less digits than its factorization.

133681608726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128787855.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 133681608726 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, seven hundred twenty-six".