135753191809 has 3 divisors (see below), whose sum is σ = 135753560257. Its totient is φ = 135752823362.

The previous prime is 135753191797. The next prime is 135753191813. The reversal of 135753191809 is 908191357531.

The square root of 135753191809 is 368447.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 908191357531 = 47 ⋅19323220373.

It is not a de Polignac number, because 135753191809 - 2²¹ = 135751094657 is a prime.

It is a super-2 number, since 2×135753191809² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135751191809) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 184224 + ... + 552670.

Almost surely, 2^135753191809 is an apocalyptic number.

135753191809 is the 368447-th square number.

135753191809 is the 184224-th centered octagonal number.

It is an amenable number.

135753191809 is a deficient number, since it is larger than the sum of its proper divisors (368448).

135753191809 is an frugal number, since it uses more digits than its factorization.

135753191809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736894 (or 368447 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 52.

The spelling of 135753191809 in words is "one hundred thirty-five billion, seven hundred fifty-three million, one hundred ninety-one thousand, eight hundred nine".