55610000661601 has 2 divisors, whose sum is σ = 55610000661602. Its totient is φ = 55610000661600.

The previous prime is 55610000661599. The next prime is 55610000661623. The reversal of 55610000661601 is 10616600001655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54985191040000 + 624809621601 = 7415200^2 + 790449^2 .

It is a cyclic number.

It is not a de Polignac number, because 55610000661601 - 2¹ = 55610000661599 is a prime.

Together with 55610000661599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55610000661671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805000330800 + 27805000330801.

It is an arithmetic number, because the mean of its divisors is an integer number (27805000330801).

Almost surely, 2^{55610000661601} is an apocalyptic number.

It is an amenable number.

55610000661601 is a deficient number, since it is larger than the sum of its proper divisors (1).

55610000661601 is an equidigital number, since it uses as much as digits as its factorization.

55610000661601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 55610000661601 in words is "fifty-five trillion, six hundred ten billion, six hundred sixty-one thousand, six hundred one".