135805469993 has 4 divisors (see below), whose sum is σ = 138107257680. Its totient is φ = 133503682308.

The previous prime is 135805469983. The next prime is 135805470043. The reversal of 135805469993 is 399964508531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399964508531 = 7 ⋅57137786933.

It is a cyclic number.

It is not a de Polignac number, because 135805469993 - 2¹⁰ = 135805468969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135805469963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150893755 + ... + 1150893872.

It is an arithmetic number, because the mean of its divisors is an integer number (34526814420).

Almost surely, 2^135805469993 is an apocalyptic number.

It is an amenable number.

135805469993 is a deficient number, since it is larger than the sum of its proper divisors (2301787687).

135805469993 is an equidigital number, since it uses as much as digits as its factorization.

135805469993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301787686.

The product of its (nonzero) digits is 31492800, while the sum is 62.

The spelling of 135805469993 in words is "one hundred thirty-five billion, eight hundred five million, four hundred sixty-nine thousand, nine hundred ninety-three".