136864818 has 12 divisors (see below), whose sum is σ = 296540478. Its totient is φ = 45621600.

The previous prime is 136864817. The next prime is 136864873. The reversal of 136864818 is 818468631.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 99740169 + 37124649 = 9987^2 + 6093^2 .

It is not an unprimeable number, because it can be changed into a prime (136864817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3801783 + ... + 3801818.

Almost surely, 2^136864818 is an apocalyptic number.

136864818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136864818 is an abundant number, since it is smaller than the sum of its proper divisors (159675660).

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

136864818 is a wasteful number, since it uses less digits than its factorization.

136864818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7603609 (or 7603606 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 136864818 is about 11698.9237966575. The cubic root of 136864818 is about 515.3440601580.

The spelling of 136864818 in words is "one hundred thirty-six million, eight hundred sixty-four thousand, eight hundred eighteen".