12506575993 has 4 divisors (see below), whose sum is σ = 12515686308. Its totient is φ = 12497465680.

The previous prime is 12506575951. The next prime is 12506576003. The reversal of 12506575993 is 39957560521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12305021184 + 201554809 = 110928^2 + 14197^2 .

It is a cyclic number.

It is not a de Polignac number, because 12506575993 - 2¹⁷ = 12506444921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12506575993.

It is not an unprimeable number, because it can be changed into a prime (12506575493) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4553098 + ... + 4555843.

It is an arithmetic number, because the mean of its divisors is an integer number (3128921577).

Almost surely, 2^12506575993 is an apocalyptic number.

It is an amenable number.

12506575993 is a deficient number, since it is larger than the sum of its proper divisors (9110315).

12506575993 is an equidigital number, since it uses as much as digits as its factorization.

12506575993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9110314.

The product of its (nonzero) digits is 2551500, while the sum is 52.

The spelling of 12506575993 in words is "twelve billion, five hundred six million, five hundred seventy-five thousand, nine hundred ninety-three".