12988504145 has 4 divisors (see below), whose sum is σ = 15586204980. Its totient is φ = 10390803312.

The previous prime is 12988504141. The next prime is 12988504147. The reversal of 12988504145 is 54140588921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54140588921 = 29077 ⋅1861973.

It can be written as a sum of positive squares in 2 ways, for example, as 9494748481 + 3493755664 = 97441^2 + 59108^2 .

It is a cyclic number.

It is not a de Polignac number, because 12988504145 - 2² = 12988504141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12988504145.

It is not an unprimeable number, because it can be changed into a prime (12988504141) 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, 1298850410 + ... + 1298850419.

It is an arithmetic number, because the mean of its divisors is an integer number (3896551245).

Almost surely, 2^12988504145 is an apocalyptic number.

It is an amenable number.

12988504145 is a deficient number, since it is larger than the sum of its proper divisors (2597700835).

12988504145 is an equidigital number, since it uses as much as digits as its factorization.

12988504145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597700834.

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 12988504145 in words is "twelve billion, nine hundred eighty-eight million, five hundred four thousand, one hundred forty-five".