133681608361 has 12 divisors (see below), whose sum is σ = 155695261968. Its totient is φ = 114445646952.

The previous prime is 133681608329. The next prime is 133681608433. The reversal of 133681608361 is 163806186331.

It is not a de Polignac number, because 133681608361 - 2⁵ = 133681608329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133681603361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1608931 + ... + 1689976.

It is an arithmetic number, because the mean of its divisors is an integer number (12974605164).

Almost surely, 2^133681608361 is an apocalyptic number.

It is an amenable number.

133681608361 is a deficient number, since it is larger than the sum of its proper divisors (22013653607).

133681608361 is an equidigital number, since it uses as much as digits as its factorization.

133681608361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299748 (or 3299741 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 133681608361 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, three hundred sixty-one".