136643243265 has 24 divisors (see below), whose sum is σ = 236895684480. Its totient is φ = 72861813024.

The previous prime is 136643243257. The next prime is 136643243279. The reversal of 136643243265 is 562342346631.

136643243265 is a `hidden beast` number, since 1 + 3 + 6 + 64 + 324 + 3 + 265 = 666.

It is not a de Polignac number, because 136643243265 - 2³ = 136643243257 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 136643243265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74547 + ... + 528056.

It is an arithmetic number, because the mean of its divisors is an integer number (9870653520).

Almost surely, 2^136643243265 is an apocalyptic number.

136643243265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136643243265 is a deficient number, since it is larger than the sum of its proper divisors (100252441215).

136643243265 is a wasteful number, since it uses less digits than its factorization.

136643243265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607653 (or 607650 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

Adding to 136643243265 its reverse (562342346631), we get a palindrome (698985589896).

The spelling of 136643243265 in words is "one hundred thirty-six billion, six hundred forty-three million, two hundred forty-three thousand, two hundred sixty-five".