133766242441409 has 2 divisors, whose sum is σ = 133766242441410. Its totient is φ = 133766242441408.

The previous prime is 133766242441399. The next prime is 133766242441421. The reversal of 133766242441409 is 904144242667331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132194345856400 + 1571896585009 = 11497580^2 + 1253753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133766242441409 is a prime.

It is not a weakly prime, because it can be changed into another prime (133766242440409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66883121220704 + 66883121220705.

It is an arithmetic number, because the mean of its divisors is an integer number (66883121220705).

Almost surely, 2^{133766242441409} is an apocalyptic number.

It is an amenable number.

133766242441409 is a deficient number, since it is larger than the sum of its proper divisors (1).

133766242441409 is an equidigital number, since it uses as much as digits as its factorization.

133766242441409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 56.

The spelling of 133766242441409 in words is "one hundred thirty-three trillion, seven hundred sixty-six billion, two hundred forty-two million, four hundred forty-one thousand, four hundred nine".