1005550655 has 4 divisors (see below), whose sum is σ = 1206660792. Its totient is φ = 804440520.

The previous prime is 1005550643. The next prime is 1005550703. The reversal of 1005550655 is 5560555001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5560555001 = 409 ⋅13595489.

It is not a de Polignac number, because 1005550655 - 2¹² = 1005546559 is a prime.

It is a super-2 number, since 2×1005550655² = 2022264239541858050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 100555061 + ... + 100555070.

It is an arithmetic number, because the mean of its divisors is an integer number (301665198).

Almost surely, 2^1005550655 is an apocalyptic number.

1005550655 is a deficient number, since it is larger than the sum of its proper divisors (201110137).

1005550655 is an equidigital number, since it uses as much as digits as its factorization.

1005550655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201110136.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 1005550655 is about 31710.4187137288. The cubic root of 1005550655 is about 1001.8468055430.

The spelling of 1005550655 in words is "one billion, five million, five hundred fifty thousand, six hundred fifty-five".