136180904985 has 24 divisors (see below), whose sum is σ = 238890847104. Its totient is φ = 71754756000.

The previous prime is 136180904971. The next prime is 136180905001. The reversal of 136180904985 is 589409081631.

136180904985 is a `hidden beast` number, since 1 + 3 + 61 + 8 + 0 + 90 + 498 + 5 = 666.

It is not a de Polignac number, because 136180904985 - 2¹¹ = 136180902937 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18226641 + ... + 18234110.

It is an arithmetic number, because the mean of its divisors is an integer number (9953785296).

Almost surely, 2^136180904985 is an apocalyptic number.

136180904985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136180904985 is a deficient number, since it is larger than the sum of its proper divisors (102709942119).

136180904985 is a wasteful number, since it uses less digits than its factorization.

136180904985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36460845 (or 36460842 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 136180904985 in words is "one hundred thirty-six billion, one hundred eighty million, nine hundred four thousand, nine hundred eighty-five".