12513304861 has 4 divisors (see below), whose sum is σ = 12582439324. Its totient is φ = 12444170400.

The previous prime is 12513304819. The next prime is 12513304889. The reversal of 12513304861 is 16840331521.

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 323820025 + 12189484836 = 17995^2 + 110406^2 .

It is a cyclic number.

It is not a de Polignac number, because 12513304861 - 2¹³ = 12513296669 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 (12513304561) 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, 34566960 + ... + 34567321.

It is an arithmetic number, because the mean of its divisors is an integer number (3145609831).

Almost surely, 2^12513304861 is an apocalyptic number.

It is an amenable number.

12513304861 is a deficient number, since it is larger than the sum of its proper divisors (69134463).

12513304861 is an equidigital number, since it uses as much as digits as its factorization.

12513304861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69134462.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 12513304861 in words is "twelve billion, five hundred thirteen million, three hundred four thousand, eight hundred sixty-one".