136823531146 has 4 divisors (see below), whose sum is σ = 205235296722. Its totient is φ = 68411765572.

The previous prime is 136823531123. The next prime is 136823531147. The reversal of 136823531146 is 641135328631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641135328631 = 7 ⋅91590761233.

It can be written as a sum of positive squares in only one way, i.e., 128279301921 + 8544229225 = 358161^2 + 92435^2 .

It is not an unprimeable number, because it can be changed into a prime (136823531147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34205882785 + ... + 34205882788.

Almost surely, 2^136823531146 is an apocalyptic number.

136823531146 is a deficient number, since it is larger than the sum of its proper divisors (68411765576).

136823531146 is an equidigital number, since it uses as much as digits as its factorization.

136823531146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68411765575.

The product of its digits is 311040, while the sum is 43.

Adding to 136823531146 its reverse (641135328631), we get a palindrome (777958859777).

The spelling of 136823531146 in words is "one hundred thirty-six billion, eight hundred twenty-three million, five hundred thirty-one thousand, one hundred forty-six".