136644263 has 8 divisors (see below), whose sum is σ = 156280320. Its totient is φ = 117037080.

The previous prime is 136644251. The next prime is 136644269. The reversal of 136644263 is 362446631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136644263 - 2¹⁰ = 136643239 is a prime.

It is a super-2 number, since 2×136644263² = 37343309221626338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136644269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118 + ... + 17036.

It is an arithmetic number, because the mean of its divisors is an integer number (19535040).

Almost surely, 2^136644263 is an apocalyptic number.

136644263 is a deficient number, since it is larger than the sum of its proper divisors (19636057).

136644263 is a wasteful number, since it uses less digits than its factorization.

136644263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14437.

The product of its digits is 62208, while the sum is 35.

The square root of 136644263 is about 11689.4937016109. The cubic root of 136644263 is about 515.0670890071.

The spelling of 136644263 in words is "one hundred thirty-six million, six hundred forty-four thousand, two hundred sixty-three".