135818658473 has 4 divisors (see below), whose sum is σ = 135900331008. Its totient is φ = 135736985940.

The previous prime is 135818658439. The next prime is 135818658509. The reversal of 135818658473 is 374856818531.

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.

It is a cyclic number.

It is not a de Polignac number, because 135818658473 - 2¹⁶ = 135818592937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135818658413) 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, 40833773 + ... + 40837098.

It is an arithmetic number, because the mean of its divisors is an integer number (33975082752).

Almost surely, 2^135818658473 is an apocalyptic number.

It is an amenable number.

135818658473 is a deficient number, since it is larger than the sum of its proper divisors (81672535).

135818658473 is an equidigital number, since it uses as much as digits as its factorization.

135818658473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81672534.

The product of its digits is 19353600, while the sum is 59.

The spelling of 135818658473 in words is "one hundred thirty-five billion, eight hundred eighteen million, six hundred fifty-eight thousand, four hundred seventy-three".