550550091 has 64 divisors (see below), whose sum is σ = 936585216. Its totient is φ = 279936000.

The previous prime is 550550087. The next prime is 550550101. The reversal of 550550091 is 190055055.

It is not a de Polignac number, because 550550091 - 2² = 550550087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550550041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1130250 + ... + 1130736.

It is an arithmetic number, because the mean of its divisors is an integer number (14634144).

Almost surely, 2^550550091 is an apocalyptic number.

550550091 is a deficient number, since it is larger than the sum of its proper divisors (386035125).

550550091 is a wasteful number, since it uses less digits than its factorization.

550550091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 550550091 is about 23463.8038476288. The cubic root of 550550091 is about 819.5943318624.

The spelling of 550550091 in words is "five hundred fifty million, five hundred fifty thousand, ninety-one".