12870512549 has 4 divisors (see below), whose sum is σ = 13081504620. Its totient is φ = 12659520480.

The previous prime is 12870512491. The next prime is 12870512597. The reversal of 12870512549 is 94521507821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94521507821 = 13 ⋅7270885217.

It can be written as a sum of positive squares in 2 ways, for example, as 7483980100 + 5386532449 = 86510^2 + 73393^2 .

It is a cyclic number.

It is not a de Polignac number, because 12870512549 - 2¹⁶ = 12870447013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12870512849) 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, 105495944 + ... + 105496065.

It is an arithmetic number, because the mean of its divisors is an integer number (3270376155).

Almost surely, 2^12870512549 is an apocalyptic number.

It is an amenable number.

12870512549 is a deficient number, since it is larger than the sum of its proper divisors (210992071).

12870512549 is an equidigital number, since it uses as much as digits as its factorization.

12870512549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210992070.

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 12870512549 in words is "twelve billion, eight hundred seventy million, five hundred twelve thousand, five hundred forty-nine".