12426564042061 has 16 divisors (see below), whose sum is σ = 13400660473200. Its totient is φ = 11455070404608.

The previous prime is 12426564042007. The next prime is 12426564042071. The reversal of 12426564042061 is 16024046562421.

It can be written as a sum of positive squares in 8 ways, for example, as 4496651721961 + 7929912320100 = 2120531^2 + 2816010^2 .

It is a cyclic number.

It is not a de Polignac number, because 12426564042061 - 2³¹ = 12424416558413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12426564041999 and 12426564042017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12426564042071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250869945 + ... + 250919473.

It is an arithmetic number, because the mean of its divisors is an integer number (837541279575).

Almost surely, 2^{12426564042061} is an apocalyptic number.

It is an amenable number.

12426564042061 is a deficient number, since it is larger than the sum of its proper divisors (974096431139).

12426564042061 is a wasteful number, since it uses less digits than its factorization.

12426564042061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75408.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 12426564042061 in words is "twelve trillion, four hundred twenty-six billion, five hundred sixty-four million, forty-two thousand, sixty-one".