135555623 has 8 divisors (see below), whose sum is σ = 155256192. Its totient is φ = 115938936.

The previous prime is 135555611. The next prime is 135555631. The reversal of 135555623 is 326555531.

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 135555623 - 2¹⁶ = 135490087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135555023) 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 7 ways as a sum of consecutive naturals, for example, 17465 + ... + 24002.

It is an arithmetic number, because the mean of its divisors is an integer number (19407024).

Almost surely, 2^135555623 is an apocalyptic number.

135555623 is a deficient number, since it is larger than the sum of its proper divisors (19700569).

135555623 is an equidigital number, since it uses as much as digits as its factorization.

135555623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41941.

The product of its digits is 67500, while the sum is 35.

The square root of 135555623 is about 11642.8356941082. The cubic root of 135555623 is about 513.6955999175.

The spelling of 135555623 in words is "one hundred thirty-five million, five hundred fifty-five thousand, six hundred twenty-three".