12215205754455 has 32 divisors (see below), whose sum is σ = 22008863397888. Its totient is φ = 5731474838400.

The previous prime is 12215205754403. The next prime is 12215205754483. The reversal of 12215205754455 is 55445750251221.

It is not a de Polignac number, because 12215205754455 - 2⁶ = 12215205754391 is a prime.

It is a super-4 number, since 4×12215205754455⁴ (a number of 53 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1194052144 + ... + 1194062373.

It is an arithmetic number, because the mean of its divisors is an integer number (687776981184).

Almost surely, 2^{12215205754455} is an apocalyptic number.

12215205754455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12215205754455 is a deficient number, since it is larger than the sum of its proper divisors (9793657643433).

12215205754455 is a wasteful number, since it uses less digits than its factorization.

12215205754455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388114567.

The product of its (nonzero) digits is 2800000, while the sum is 48.

The spelling of 12215205754455 in words is "twelve trillion, two hundred fifteen billion, two hundred five million, seven hundred fifty-four thousand, four hundred fifty-five".