55005150661 has 8 divisors (see below), whose sum is σ = 55177962840. Its totient is φ = 54832593408.

The previous prime is 55005150659. The next prime is 55005150677. The reversal of 55005150661 is 16605150055.

It can be written as a sum of positive squares in 4 ways, for example, as 25854710436 + 29150440225 = 160794^2 + 170735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55005150661 - 2¹ = 55005150659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005150631) 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 in 7 ways as a sum of consecutive naturals, for example, 373165 + ... + 499261.

It is an arithmetic number, because the mean of its divisors is an integer number (6897245355).

Almost surely, 2^55005150661 is an apocalyptic number.

It is an amenable number.

55005150661 is a deficient number, since it is larger than the sum of its proper divisors (172812179).

55005150661 is a wasteful number, since it uses less digits than its factorization.

55005150661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127463.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 55005150661 in words is "fifty-five billion, five million, one hundred fifty thousand, six hundred sixty-one".