12553899871 has 4 divisors (see below), whose sum is σ = 12986793000. Its totient is φ = 12121006744.

The previous prime is 12553899833. The next prime is 12553899877. The reversal of 12553899871 is 17899835521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12553899871 - 2⁹ = 12553899359 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553899877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216446521 + ... + 216446578.

It is an arithmetic number, because the mean of its divisors is an integer number (3246698250).

Almost surely, 2^12553899871 is an apocalyptic number.

12553899871 is a deficient number, since it is larger than the sum of its proper divisors (432893129).

12553899871 is an equidigital number, since it uses as much as digits as its factorization.

12553899871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432893128.

The product of its digits is 5443200, while the sum is 58.

The spelling of 12553899871 in words is "twelve billion, five hundred fifty-three million, eight hundred ninety-nine thousand, eight hundred seventy-one".