136685540 has 12 divisors (see below), whose sum is σ = 287039676. Its totient is φ = 54674208.

The previous prime is 136685537. The next prime is 136685551. The reversal of 136685540 is 45586631.

It can be written as a sum of positive squares in 2 ways, for example, as 23348224 + 113337316 = 4832^2 + 10646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136685494 and 136685503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3417119 + ... + 3417158.

It is an arithmetic number, because the mean of its divisors is an integer number (23919973).

Almost surely, 2^136685540 is an apocalyptic number.

136685540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136685540 is an abundant number, since it is smaller than the sum of its proper divisors (150354136).

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

136685540 is a wasteful number, since it uses less digits than its factorization.

136685540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834286 (or 6834284 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 136685540 is about 11691.2591280837. The cubic root of 136685540 is about 515.1189469809.

The spelling of 136685540 in words is "one hundred thirty-six million, six hundred eighty-five thousand, five hundred forty".