133240000781 has 8 divisors (see below), whose sum is σ = 134013007128. Its totient is φ = 132467400000.

The previous prime is 133240000769. The next prime is 133240000783. The reversal of 133240000781 is 187000042331.

It can be written as a sum of positive squares in 4 ways, for example, as 5051655625 + 128188345156 = 71075^2 + 358034^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133240000781 is a prime.

It is a super-2 number, since 2×133240000781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133240000783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570431 + ... + 769331.

It is an arithmetic number, because the mean of its divisors is an integer number (16751625891).

Almost surely, 2^133240000781 is an apocalyptic number.

It is an amenable number.

133240000781 is a deficient number, since it is larger than the sum of its proper divisors (773006347).

133240000781 is a wasteful number, since it uses less digits than its factorization.

133240000781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202783.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 133240000781 in words is "one hundred thirty-three billion, two hundred forty million, seven hundred eighty-one", and thus it is an aban number.