56461220513 has 2 divisors, whose sum is σ = 56461220514. Its totient is φ = 56461220512.

The previous prime is 56461220419. The next prime is 56461220533. The reversal of 56461220513 is 31502216465.

56461220513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51871429009 + 4589791504 = 227753^2 + 67748^2 .

It is a cyclic number.

It is not a de Polignac number, because 56461220513 - 2²² = 56457026209 is a prime.

It is a super-2 number, since 2×56461220513² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56461220533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28230610256 + 28230610257.

It is an arithmetic number, because the mean of its divisors is an integer number (28230610257).

Almost surely, 2^56461220513 is an apocalyptic number.

It is an amenable number.

56461220513 is a deficient number, since it is larger than the sum of its proper divisors (1).

56461220513 is an equidigital number, since it uses as much as digits as its factorization.

56461220513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 56461220513 its reverse (31502216465), we get a palindrome (87963436978).

The spelling of 56461220513 in words is "fifty-six billion, four hundred sixty-one million, two hundred twenty thousand, five hundred thirteen".