133604580257 has 4 divisors (see below), whose sum is σ = 133605457476. Its totient is φ = 133603703040.

The previous prime is 133604580229. The next prime is 133604580379. The reversal of 133604580257 is 752085406331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 752085406331 = 7 ⋅107440772333.

It can be written as a sum of positive squares in 2 ways, for example, as 5595189601 + 128009390656 = 74801^2 + 357784^2 .

It is a cyclic number.

It is not a de Polignac number, because 133604580257 - 2¹⁰ = 133604579233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133604580157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144344 + ... + 536697.

It is an arithmetic number, because the mean of its divisors is an integer number (33401364369).

Almost surely, 2^133604580257 is an apocalyptic number.

It is an amenable number.

133604580257 is a deficient number, since it is larger than the sum of its proper divisors (877219).

133604580257 is an equidigital number, since it uses as much as digits as its factorization.

133604580257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877218.

The product of its (nonzero) digits is 604800, while the sum is 44.

Adding to 133604580257 its reverse (752085406331), we get a palindrome (885689986588).

The spelling of 133604580257 in words is "one hundred thirty-three billion, six hundred four million, five hundred eighty thousand, two hundred fifty-seven".