12837246561 has 12 divisors (see below), whose sum is σ = 18544475092. Its totient is φ = 8557340256.

The previous prime is 12837246559. The next prime is 12837246571. The reversal of 12837246561 is 16564273821.

12837246561 is a `hidden beast` number, since 1 + 2 + 83 + 7 + 2 + 4 + 6 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7764958161 + 5072288400 = 88119^2 + 71220^2 .

It is not a de Polignac number, because 12837246561 - 2¹ = 12837246559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12837246571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38835 + ... + 164871.

Almost surely, 2^12837246561 is an apocalyptic number.

It is an amenable number.

12837246561 is a deficient number, since it is larger than the sum of its proper divisors (5707228531).

12837246561 is a wasteful number, since it uses less digits than its factorization.

12837246561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137360 (or 137357 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 12837246561 in words is "twelve billion, eight hundred thirty-seven million, two hundred forty-six thousand, five hundred sixty-one".