136643521665330 has 64 divisors (see below), whose sum is σ = 365359622094720. Its totient is φ = 36340582678848.

The previous prime is 136643521665253. The next prime is 136643521665331. The reversal of 136643521665330 is 33566125346631.

136643521665330 is a `hidden beast` number, since 1 + 3 + 6 + 6 + 4 + 3 + 521 + 66 + 53 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (136643521665331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 678300252 + ... + 678501671.

It is an arithmetic number, because the mean of its divisors is an integer number (5708744095230).

Almost surely, 2^{136643521665330} is an apocalyptic number.

136643521665330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136643521665330 is an abundant number, since it is smaller than the sum of its proper divisors (228716100429390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136643521665330 is a wasteful number, since it uses less digits than its factorization.

136643521665330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356802312 (or 1356802306 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 54.

The spelling of 136643521665330 in words is "one hundred thirty-six trillion, six hundred forty-three billion, five hundred twenty-one million, six hundred sixty-five thousand, three hundred thirty".