12217557755 has 16 divisors (see below), whose sum is σ = 16333289280. Its totient is φ = 8711084928.

The previous prime is 12217557727. The next prime is 12217557757. The reversal of 12217557755 is 55775571221.

It is not a de Polignac number, because 12217557755 - 2¹⁸ = 12217295611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12217557757) 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, 3238847 + ... + 3242616.

It is an arithmetic number, because the mean of its divisors is an integer number (1020830580).

Almost surely, 2^12217557755 is an apocalyptic number.

12217557755 is a deficient number, since it is larger than the sum of its proper divisors (4115731525).

12217557755 is a wasteful number, since it uses less digits than its factorization.

12217557755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6481510.

The product of its digits is 857500, while the sum is 47.

The spelling of 12217557755 in words is "twelve billion, two hundred seventeen million, five hundred fifty-seven thousand, seven hundred fifty-five".