135644555 has 4 divisors (see below), whose sum is σ = 162773472. Its totient is φ = 108515640.

The previous prime is 135644549. The next prime is 135644557. The reversal of 135644555 is 555446531.

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

It is not a de Polignac number, because 135644555 - 2¹⁰ = 135643531 is a prime.

It is a super-2 number, since 2×135644555² = 36798890602296050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135644557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13564451 + ... + 13564460.

It is an arithmetic number, because the mean of its divisors is an integer number (40693368).

Almost surely, 2^135644555 is an apocalyptic number.

135644555 is a deficient number, since it is larger than the sum of its proper divisors (27128917).

135644555 is an equidigital number, since it uses as much as digits as its factorization.

135644555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27128916.

The product of its digits is 180000, while the sum is 38.

The square root of 135644555 is about 11646.6542405963. The cubic root of 135644555 is about 513.8079129526.

The spelling of 135644555 in words is "one hundred thirty-five million, six hundred forty-four thousand, five hundred fifty-five".