136555405 has 12 divisors (see below), whose sum is σ = 190620540. Its totient is φ = 93637824.

The previous prime is 136555387. The next prime is 136555409. The reversal of 136555405 is 504555631.

It can be written as a sum of positive squares in 2 ways, for example, as 20196036 + 116359369 = 4494^2 + 10787^2 .

It is not a de Polignac number, because 136555405 - 2⁷ = 136555277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136555409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278440 + ... + 278929.

It is an arithmetic number, because the mean of its divisors is an integer number (15885045).

Almost surely, 2^136555405 is an apocalyptic number.

It is an amenable number.

136555405 is a deficient number, since it is larger than the sum of its proper divisors (54065135).

136555405 is an equidigital number, since it uses as much as digits as its factorization.

136555405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557388 (or 557381 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 136555405 is about 11685.6923200981. The cubic root of 136555405 is about 514.9554176382.

The spelling of 136555405 in words is "one hundred thirty-six million, five hundred fifty-five thousand, four hundred five".