133055621606813 has 4 divisors (see below), whose sum is σ = 140882422877820. Its totient is φ = 125228820335808.

The previous prime is 133055621606801. The next prime is 133055621606827. The reversal of 133055621606813 is 318606126550331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110412137567524 + 22643484039289 = 10507718^2 + 4758517^2 .

It is not a de Polignac number, because 133055621606813 - 2³⁶ = 132986902130077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133055621606863) 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, 3913400635478 + ... + 3913400635511.

It is an arithmetic number, because the mean of its divisors is an integer number (35220605719455).

Almost surely, 2^{133055621606813} is an apocalyptic number.

It is an amenable number.

133055621606813 is a deficient number, since it is larger than the sum of its proper divisors (7826801271007).

133055621606813 is an equidigital number, since it uses as much as digits as its factorization.

133055621606813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7826801271006.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 133055621606813 in words is "one hundred thirty-three trillion, fifty-five billion, six hundred twenty-one million, six hundred six thousand, eight hundred thirteen".