1561340433213 has 48 divisors (see below), whose sum is σ = 2466773337600. Its totient is φ = 943777729440.

The previous prime is 1561340433161. The next prime is 1561340433239. The reversal of 1561340433213 is 3123340431651.

1561340433213 is a `hidden beast` number, since 1 + 5 + 6 + 1 + 3 + 4 + 0 + 433 + 213 = 666.

It is not a de Polignac number, because 1561340433213 - 2³² = 1557045465917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561347433213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71416878 + ... + 71438736.

It is an arithmetic number, because the mean of its divisors is an integer number (51391111200).

Almost surely, 2^{1561340433213} is an apocalyptic number.

It is an amenable number.

1561340433213 is a deficient number, since it is larger than the sum of its proper divisors (905432904387).

1561340433213 is a wasteful number, since it uses less digits than its factorization.

1561340433213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23742 (or 23739 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 1561340433213 its reverse (3123340431651), we get a palindrome (4684680864864).

The spelling of 1561340433213 in words is "one trillion, five hundred sixty-one billion, three hundred forty million, four hundred thirty-three thousand, two hundred thirteen".