12553266235520 has 64 divisors (see below), whose sum is σ = 30013336555200. Its totient is φ = 5020773669888.

The previous prime is 12553266235511. The next prime is 12553266235541. The reversal of 12553266235520 is 2553266235521.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5022941 + ... + 7094819.

It is an arithmetic number, because the mean of its divisors is an integer number (468958383675).

Almost surely, 2^{12553266235520} is an apocalyptic number.

12553266235520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12553266235520 is an abundant number, since it is smaller than the sum of its proper divisors (17460070319680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12553266235520 is an equidigital number, since it uses as much as digits as its factorization.

12553266235520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081365 (or 2081353 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 47.

Subtracting from 12553266235520 its reverse (2553266235521), we obtain a palindrome (9999999999999).

The spelling of 12553266235520 in words is "twelve trillion, five hundred fifty-three billion, two hundred sixty-six million, two hundred thirty-five thousand, five hundred twenty".