1216634105255 has 16 divisors (see below), whose sum is σ = 1470112448448. Its totient is φ = 966543840000.

The previous prime is 1216634105251. The next prime is 1216634105257. The reversal of 1216634105255 is 5525014366121.

It is not a de Polignac number, because 1216634105255 - 2² = 1216634105251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216634105251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2047835 + ... + 2574275.

It is an arithmetic number, because the mean of its divisors is an integer number (91882028028).

Almost surely, 2^{1216634105255} is an apocalyptic number.

1216634105255 is a deficient number, since it is larger than the sum of its proper divisors (253478343193).

1216634105255 is a wasteful number, since it uses less digits than its factorization.

1216634105255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529658.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 1216634105255 in words is "one trillion, two hundred sixteen billion, six hundred thirty-four million, one hundred five thousand, two hundred fifty-five".