55550001161 has 2 divisors, whose sum is σ = 55550001162. Its totient is φ = 55550001160.

The previous prime is 55550001127. The next prime is 55550001179. The reversal of 55550001161 is 16110005555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43448901136 + 12101100025 = 208444^2 + 110005^2 .

It is a cyclic number.

It is not a de Polignac number, because 55550001161 - 2¹⁰ = 55550000137 is a prime.

It is not a weakly prime, because it can be changed into another prime (55550001191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775000580 + 27775000581.

It is an arithmetic number, because the mean of its divisors is an integer number (27775000581).

Almost surely, 2^55550001161 is an apocalyptic number.

It is an amenable number.

55550001161 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550001161 is an equidigital number, since it uses as much as digits as its factorization.

55550001161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 55550001161 in words is "fifty-five billion, five hundred fifty million, one thousand, one hundred sixty-one".