136699533441 has 15 divisors (see below), whose sum is σ = 204210446803. Its totient is φ = 91130803920.

The previous prime is 136699533419. The next prime is 136699533461. The reversal of 136699533441 is 144335996631.

It is a happy number.

The square root of 136699533441 is 369729.

It is a perfect power (a square), and thus also a powerful number.

136699533441 is a `hidden beast` number, since 1 + 3 + 6 + 69 + 9 + 533 + 4 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 57446023041 + 79253510400 = 239679^2 + 281520^2 .

It is not a de Polignac number, because 136699533441 - 2²⁷ = 136565315713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136699533461) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3307021 + ... + 3348101.

Almost surely, 2^136699533441 is an apocalyptic number.

136699533441 is the 369729-th square number.

136699533441 is the 184865-th centered octagonal number.

It is an amenable number.

136699533441 is a deficient number, since it is larger than the sum of its proper divisors (67510913362).

136699533441 is an frugal number, since it uses more digits than its factorization.

136699533441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82174 (or 41084 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 54.

The spelling of 136699533441 in words is "one hundred thirty-six billion, six hundred ninety-nine million, five hundred thirty-three thousand, four hundred forty-one".