55550549993 has 2 divisors, whose sum is σ = 55550549994. Its totient is φ = 55550549992.

The previous prime is 55550549981. The next prime is 55550550031. The reversal of 55550549993 is 39994505555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35189257744 + 20361292249 = 187588^2 + 142693^2 .

It is a cyclic number.

It is not a de Polignac number, because 55550549993 - 2²⁶ = 55483441129 is a prime.

It is not a weakly prime, because it can be changed into another prime (55550549893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775274996 + 27775274997.

It is an arithmetic number, because the mean of its divisors is an integer number (27775274997).

Almost surely, 2^55550549993 is an apocalyptic number.

It is an amenable number.

55550549993 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550549993 is an equidigital number, since it uses as much as digits as its factorization.

55550549993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27337500, while the sum is 59.

The spelling of 55550549993 in words is "fifty-five billion, five hundred fifty million, five hundred forty-nine thousand, nine hundred ninety-three".