136278805 has 8 divisors (see below), whose sum is σ = 176114232. Its totient is φ = 100636608.

The previous prime is 136278787. The next prime is 136278829. The reversal of 136278805 is 508872631.

136278805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 66564 + 136212241 = 258^2 + 11671^2 .

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 136278805 - 2¹⁷ = 136147733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048234 + ... + 1048363.

It is an arithmetic number, because the mean of its divisors is an integer number (22014279).

Almost surely, 2^136278805 is an apocalyptic number.

It is an amenable number.

136278805 is a deficient number, since it is larger than the sum of its proper divisors (39835427).

136278805 is a wasteful number, since it uses less digits than its factorization.

136278805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096615.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 136278805 is about 11673.8513353563. The cubic root of 136278805 is about 514.6074930532.

The spelling of 136278805 in words is "one hundred thirty-six million, two hundred seventy-eight thousand, eight hundred five".