55556161061 has 2 divisors, whose sum is σ = 55556161062. Its totient is φ = 55556161060.

The previous prime is 55556161043. The next prime is 55556161103. The reversal of 55556161061 is 16016165555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55455540100 + 100620961 = 235490^2 + 10031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55556161061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55556161021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27778080530 + 27778080531.

It is an arithmetic number, because the mean of its divisors is an integer number (27778080531).

Almost surely, 2^55556161061 is an apocalyptic number.

It is an amenable number.

55556161061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55556161061 is an equidigital number, since it uses as much as digits as its factorization.

55556161061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135000, while the sum is 41.

It can be divided in two parts, 5555 and 6161061, that added together give a palindrome (6166616).

The spelling of 55556161061 in words is "fifty-five billion, five hundred fifty-six million, one hundred sixty-one thousand, sixty-one".