133536668399 has 4 divisors (see below), whose sum is σ = 134432887800. Its totient is φ = 132640449000.

The previous prime is 133536668383. The next prime is 133536668449. The reversal of 133536668399 is 993866635331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993866635331 = 59 ⋅16845197209.

It is a cyclic number.

It is not a de Polignac number, because 133536668399 - 2⁴ = 133536668383 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 (133536668999) 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, 448109477 + ... + 448109774.

It is an arithmetic number, because the mean of its divisors is an integer number (33608221950).

Almost surely, 2^133536668399 is an apocalyptic number.

133536668399 is a deficient number, since it is larger than the sum of its proper divisors (896219401).

133536668399 is an equidigital number, since it uses as much as digits as its factorization.

133536668399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896219400.

The product of its digits is 56687040, while the sum is 62.

The spelling of 133536668399 in words is "one hundred thirty-three billion, five hundred thirty-six million, six hundred sixty-eight thousand, three hundred ninety-nine".