12555500555522 has 16 divisors (see below), whose sum is σ = 19482766212600. Its totient is φ = 6061247216640.

The previous prime is 12555500555513. The next prime is 12555500555531. The reversal of 12555500555522 is 22555500555521.

It is an interprime number because it is at equal distance from previous prime (12555500555513) and next prime (12555500555531).

It can be written as a sum of positive squares in 4 ways, for example, as 12552501788401 + 2998767121 = 3542951^2 + 54761^2 .

It is a super-5 number, since 5×12555500555522⁵ (a number of 67 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16593122 + ... + 17333282.

Almost surely, 2^{12555500555522} is an apocalyptic number.

12555500555522 is a deficient number, since it is larger than the sum of its proper divisors (6927265657078).

12555500555522 is a wasteful number, since it uses less digits than its factorization.

12555500555522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032661.

The product of its (nonzero) digits is 3125000, while the sum is 47.

Subtracting 12555500555522 from its reverse (22555500555521), we obtain a palindrome (9999999999999).

The spelling of 12555500555522 in words is "twelve trillion, five hundred fifty-five billion, five hundred million, five hundred fifty-five thousand, five hundred twenty-two".