55505550000001 has 2 divisors, whose sum is σ = 55505550000002. Its totient is φ = 55505550000000.

The previous prime is 55505549999959. The next prime is 55505550000013. The reversal of 55505550000001 is 10000005550555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55477098407025 + 28451592976 = 7448295^2 + 168676^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505550000001 - 2¹⁹ = 55505549475713 is a prime.

It is a super-2 number, since 2×55505550000001² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55505550000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752775000000 + 27752775000001.

It is an arithmetic number, because the mean of its divisors is an integer number (27752775000001).

Almost surely, 2^{55505550000001} is an apocalyptic number.

It is an amenable number.

55505550000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505550000001 is an equidigital number, since it uses as much as digits as its factorization.

55505550000001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15625, while the sum is 31.

Adding to 55505550000001 its reverse (10000005550555), we get a palindrome (65505555550556).

The spelling of 55505550000001 in words is "fifty-five trillion, five hundred five billion, five hundred fifty million, one", and thus it is an aban number.