56561355413 has 2 divisors, whose sum is σ = 56561355414. Its totient is φ = 56561355412.

The previous prime is 56561355391. The next prime is 56561355451. The reversal of 56561355413 is 31455316565.

It is a happy number.

56561355413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35992919524 + 20568435889 = 189718^2 + 143417^2 .

It is a cyclic number.

It is not a de Polignac number, because 56561355413 - 2¹⁶ = 56561289877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56561355913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28280677706 + 28280677707.

It is an arithmetic number, because the mean of its divisors is an integer number (28280677707).

Almost surely, 2^56561355413 is an apocalyptic number.

It is an amenable number.

56561355413 is a deficient number, since it is larger than the sum of its proper divisors (1).

56561355413 is an equidigital number, since it uses as much as digits as its factorization.

56561355413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810000, while the sum is 44.

The spelling of 56561355413 in words is "fifty-six billion, five hundred sixty-one million, three hundred fifty-five thousand, four hundred thirteen".