13555045220255 has 128 divisors (see below), whose sum is σ = 22607731998720. Its totient is φ = 7542824509440.

The previous prime is 13555045220219. The next prime is 13555045220329. The reversal of 13555045220255 is 55202254055531.

It is a happy number.

It is not a de Polignac number, because 13555045220255 - 2⁸ = 13555045219999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10671167 + ... + 11873663.

It is an arithmetic number, because the mean of its divisors is an integer number (176622906240).

Almost surely, 2^{13555045220255} is an apocalyptic number.

13555045220255 is a deficient number, since it is larger than the sum of its proper divisors (9052686778465).

13555045220255 is a wasteful number, since it uses less digits than its factorization.

13555045220255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202629.

The product of its (nonzero) digits is 1500000, while the sum is 44.

Adding to 13555045220255 its reverse (55202254055531), we get a palindrome (68757299275786).

The spelling of 13555045220255 in words is "thirteen trillion, five hundred fifty-five billion, forty-five million, two hundred twenty thousand, two hundred fifty-five".