135673520399 has 16 divisors (see below), whose sum is σ = 142867003392. Its totient is φ = 128588600448.

The previous prime is 135673520383. The next prime is 135673520447. The reversal of 135673520399 is 993025376531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 135673520399 - 2⁴ = 135673520383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135673520399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135673520309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13423982 + ... + 13434084.

It is an arithmetic number, because the mean of its divisors is an integer number (8929187712).

Almost surely, 2^135673520399 is an apocalyptic number.

135673520399 is a deficient number, since it is larger than the sum of its proper divisors (7193482993).

135673520399 is a wasteful number, since it uses less digits than its factorization.

135673520399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15406.

The product of its (nonzero) digits is 4592700, while the sum is 53.

The spelling of 135673520399 in words is "one hundred thirty-five billion, six hundred seventy-three million, five hundred twenty thousand, three hundred ninety-nine".