135644554 has 4 divisors (see below), whose sum is σ = 203466834. Its totient is φ = 67822276.

The previous prime is 135644549. The next prime is 135644557. The reversal of 135644554 is 455446531.

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

It can be written as a sum of positive squares in only one way, i.e., 90687529 + 44957025 = 9523^2 + 6705^2 .

It is not an unprimeable number, because it can be changed into a prime (135644557) 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 as a sum of consecutive naturals, namely, 33911137 + ... + 33911140.

Almost surely, 2^135644554 is an apocalyptic number.

135644554 is a deficient number, since it is larger than the sum of its proper divisors (67822280).

135644554 is an equidigital number, since it uses as much as digits as its factorization.

135644554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67822279.

The product of its digits is 144000, while the sum is 37.

The square root of 135644554 is about 11646.6541976655. The cubic root of 135644554 is about 513.8079116899.

The spelling of 135644554 in words is "one hundred thirty-five million, six hundred forty-four thousand, five hundred fifty-four".