135169323619 has 4 divisors (see below), whose sum is σ = 147457443960. Its totient is φ = 122881203280.

The previous prime is 135169323587. The next prime is 135169323659. The reversal of 135169323619 is 916323961531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 135169323619 - 2⁵ = 135169323587 is a prime.

It is a super-2 number, since 2×135169323619² (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 (135169323659) 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, 6144060154 + ... + 6144060175.

It is an arithmetic number, because the mean of its divisors is an integer number (36864360990).

Almost surely, 2^135169323619 is an apocalyptic number.

135169323619 is a deficient number, since it is larger than the sum of its proper divisors (12288120341).

135169323619 is a wasteful number, since it uses less digits than its factorization.

135169323619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12288120340.

The product of its digits is 787320, while the sum is 49.

The spelling of 135169323619 in words is "one hundred thirty-five billion, one hundred sixty-nine million, three hundred twenty-three thousand, six hundred nineteen".