12511553323 has 4 divisors (see below), whose sum is σ = 12512304568. Its totient is φ = 12510802080.

The previous prime is 12511553309. The next prime is 12511553357. The reversal of 12511553323 is 32335511521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12511553323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12511553023) 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, 350061 + ... + 384142.

It is an arithmetic number, because the mean of its divisors is an integer number (3128076142).

Almost surely, 2^12511553323 is an apocalyptic number.

12511553323 is a deficient number, since it is larger than the sum of its proper divisors (751245).

12511553323 is an equidigital number, since it uses as much as digits as its factorization.

12511553323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751244.

The product of its digits is 13500, while the sum is 31.

The spelling of 12511553323 in words is "twelve billion, five hundred eleven million, five hundred fifty-three thousand, three hundred twenty-three".