136644554 has 8 divisors (see below), whose sum is σ = 209966148. Its totient is φ = 66655840.

The previous prime is 136644553. The next prime is 136644601. The reversal of 136644554 is 455446631.

It can be written as a sum of positive squares in 2 ways, for example, as 131905225 + 4739329 = 11485^2 + 2177^2 .

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

It is not an unprimeable number, because it can be changed into a prime (136644553) 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 3 ways as a sum of consecutive naturals, for example, 833117 + ... + 833280.

Almost surely, 2^136644554 is an apocalyptic number.

136644554 is a deficient number, since it is larger than the sum of its proper divisors (73321594).

136644554 is a wasteful number, since it uses less digits than its factorization.

136644554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666440.

The product of its digits is 172800, while the sum is 38.

The square root of 136644554 is about 11689.5061486788. The cubic root of 136644554 is about 515.0674546388.

The spelling of 136644554 in words is "one hundred thirty-six million, six hundred forty-four thousand, five hundred fifty-four".