55161610061 has 2 divisors, whose sum is σ = 55161610062. Its totient is φ = 55161610060.

The previous prime is 55161610057. The next prime is 55161610067. The reversal of 55161610061 is 16001616155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51429621961 + 3731988100 = 226781^2 + 61090^2 .

It is a cyclic number.

It is not a de Polignac number, because 55161610061 - 2² = 55161610057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55161610067) 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, 27580805030 + 27580805031.

It is an arithmetic number, because the mean of its divisors is an integer number (27580805031).

Almost surely, 2^55161610061 is an apocalyptic number.

It is an amenable number.

55161610061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55161610061 is an equidigital number, since it uses as much as digits as its factorization.

55161610061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 55161610061 in words is "fifty-five billion, one hundred sixty-one million, six hundred ten thousand, sixty-one".