1199555555 has 16 divisors (see below), whose sum is σ = 1571007744. Its totient is φ = 872026080.

The previous prime is 1199555549. The next prime is 1199555587. The reversal of 1199555555 is 5555559911.

It is not a de Polignac number, because 1199555555 - 2¹⁸ = 1199293411 is a prime.

It is a Duffinian number.

1199555555 is a modest number, since divided by 55555 gives 11995 as remainder.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217664 + ... + 223106.

It is an arithmetic number, because the mean of its divisors is an integer number (98187984).

Almost surely, 2^1199555555 is an apocalyptic number.

1199555555 is a deficient number, since it is larger than the sum of its proper divisors (371452189).

1199555555 is a wasteful number, since it uses less digits than its factorization.

1199555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9466.

The product of its digits is 1265625, while the sum is 50.

The square root of 1199555555 is about 34634.6005462745. The cubic root of 1199555555 is about 1062.5273604027.

The spelling of 1199555555 in words is "one billion, one hundred ninety-nine million, five hundred fifty-five thousand, five hundred fifty-five".