12561362206642 has 8 divisors (see below), whose sum is σ = 18977597578800. Its totient is φ = 6235496347044.

The previous prime is 12561362206619. The next prime is 12561362206667. The reversal of 12561362206642 is 24660226316521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12561362206592 and 12561362206601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22592377792 + ... + 22592378347.

It is an arithmetic number, because the mean of its divisors is an integer number (2372199697350).

Almost surely, 2^{12561362206642} is an apocalyptic number.

12561362206642 is a deficient number, since it is larger than the sum of its proper divisors (6416235372158).

12561362206642 is a wasteful number, since it uses less digits than its factorization.

12561362206642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45184756280.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 12561362206642 in words is "twelve trillion, five hundred sixty-one billion, three hundred sixty-two million, two hundred six thousand, six hundred forty-two".