133256820844373 has 4 divisors (see below), whose sum is σ = 137851883632140. Its totient is φ = 128661758056608.

The previous prime is 133256820844351. The next prime is 133256820844481. The reversal of 133256820844373 is 373448028652331.

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 60326553078289 + 72930267766084 = 7767017^2 + 8539922^2 .

It is a cyclic number.

It is not a de Polignac number, because 133256820844373 - 2⁶ = 133256820844309 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 (133256820844313) 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, 2297531393840 + ... + 2297531393897.

It is an arithmetic number, because the mean of its divisors is an integer number (34462970908035).

Almost surely, 2^{133256820844373} is an apocalyptic number.

It is an amenable number.

133256820844373 is a deficient number, since it is larger than the sum of its proper divisors (4595062787767).

133256820844373 is an equidigital number, since it uses as much as digits as its factorization.

133256820844373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4595062787766.

The product of its (nonzero) digits is 69672960, while the sum is 59.

The spelling of 133256820844373 in words is "one hundred thirty-three trillion, two hundred fifty-six billion, eight hundred twenty million, eight hundred forty-four thousand, three hundred seventy-three".