1099941555 has 16 divisors (see below), whose sum is σ = 1764957600. Its totient is φ = 584951808.

The previous prime is 1099941553. The next prime is 1099941571. The reversal of 1099941555 is 5551499901.

It is not a de Polignac number, because 1099941555 - 2¹ = 1099941553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1099941553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99822 + ... + 110291.

It is an arithmetic number, because the mean of its divisors is an integer number (110309850).

Almost surely, 2^1099941555 is an apocalyptic number.

1099941555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1099941555 is a deficient number, since it is larger than the sum of its proper divisors (665016045).

1099941555 is a wasteful number, since it uses less digits than its factorization.

1099941555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210470.

The product of its (nonzero) digits is 364500, while the sum is 48.

The square root of 1099941555 is about 33165.3668003235. The cubic root of 1099941555 is about 1032.2618328261.

The spelling of 1099941555 in words is "one billion, ninety-nine million, nine hundred forty-one thousand, five hundred fifty-five".