1105605551 has 4 divisors (see below), whose sum is σ = 1131317352. Its totient is φ = 1079893752.

The previous prime is 1105605533. The next prime is 1105605559. The reversal of 1105605551 is 1555065011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1105605551 - 2¹⁰ = 1105604527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105605559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12855836 + ... + 12855921.

It is an arithmetic number, because the mean of its divisors is an integer number (282829338).

Almost surely, 2^1105605551 is an apocalyptic number.

1105605551 is a deficient number, since it is larger than the sum of its proper divisors (25711801).

1105605551 is an equidigital number, since it uses as much as digits as its factorization.

1105605551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25711800.

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

The square root of 1105605551 is about 33250.6473771564. The cubic root of 1105605551 is about 1034.0306297958.

The spelling of 1105605551 in words is "one billion, one hundred five million, six hundred five thousand, five hundred fifty-one".