12553321535 has 4 divisors (see below), whose sum is σ = 15063985848. Its totient is φ = 10042657224.

The previous prime is 12553321523. The next prime is 12553321537. The reversal of 12553321535 is 53512335521.

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 12553321535 - 2¹⁶ = 12553255999 is a prime.

It is a super-2 number, since 2×12553321535² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12553321495 and 12553321504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553321537) 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, 1255332149 + ... + 1255332158.

It is an arithmetic number, because the mean of its divisors is an integer number (3765996462).

Almost surely, 2^12553321535 is an apocalyptic number.

12553321535 is a deficient number, since it is larger than the sum of its proper divisors (2510664313).

12553321535 is an equidigital number, since it uses as much as digits as its factorization.

12553321535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510664312.

The product of its digits is 67500, while the sum is 35.

The spelling of 12553321535 in words is "twelve billion, five hundred fifty-three million, three hundred twenty-one thousand, five hundred thirty-five".