136664455 has 4 divisors (see below), whose sum is σ = 163997352. Its totient is φ = 109331560.

The previous prime is 136664453. The next prime is 136664491. The reversal of 136664455 is 554466631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 136664455 - 2¹ = 136664453 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136664453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13666441 + ... + 13666450.

It is an arithmetic number, because the mean of its divisors is an integer number (40999338).

Almost surely, 2^136664455 is an apocalyptic number.

136664455 is a deficient number, since it is larger than the sum of its proper divisors (27332897).

136664455 is an equidigital number, since it uses as much as digits as its factorization.

136664455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27332896.

The product of its digits is 259200, while the sum is 40.

The square root of 136664455 is about 11690.3573512532. The cubic root of 136664455 is about 515.0924583425.

The spelling of 136664455 in words is "one hundred thirty-six million, six hundred sixty-four thousand, four hundred fifty-five".