12817811255 has 16 divisors (see below), whose sum is σ = 16195814400. Its totient is φ = 9711614880.

The previous prime is 12817811231. The next prime is 12817811257. The reversal of 12817811255 is 55211871821.

It is a happy number.

It is not a de Polignac number, because 12817811255 - 2¹² = 12817807159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12817811257) 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, 326366 + ... + 363524.

It is an arithmetic number, because the mean of its divisors is an integer number (1012238400).

Almost surely, 2^12817811255 is an apocalyptic number.

12817811255 is a deficient number, since it is larger than the sum of its proper divisors (3378003145).

12817811255 is a wasteful number, since it uses less digits than its factorization.

12817811255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40814.

The product of its digits is 44800, while the sum is 41.

The spelling of 12817811255 in words is "twelve billion, eight hundred seventeen million, eight hundred eleven thousand, two hundred fifty-five".