12553266235521 has 16 divisors (see below), whose sum is σ = 18296789787648. Its totient is φ = 7592417874000.

The previous prime is 12553266235511. The next prime is 12553266235541.

It is a happy number.

12553266235521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12553266235521 - 2⁶ = 12553266235457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12553266235511) 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, 390540405 + ... + 390572546.

It is an arithmetic number, because the mean of its divisors is an integer number (1143549361728).

Almost surely, 2^{12553266235521} is an apocalyptic number.

12553266235521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12553266235521 is a deficient number, since it is larger than the sum of its proper divisors (5743523552127).

12553266235521 is a wasteful number, since it uses less digits than its factorization.

12553266235521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781113452.

The product of its digits is 3240000, while the sum is 48.

The spelling of 12553266235521 in words is "twelve trillion, five hundred fifty-three billion, two hundred sixty-six million, two hundred thirty-five thousand, five hundred twenty-one".