1135550999 has 18 divisors (see below), whose sum is σ = 1292807880. Its totient is φ = 996632560.

The previous prime is 1135550981. The next prime is 1135551007. The reversal of 1135550999 is 9990555311.

It is a happy number.

It is not a de Polignac number, because 1135550999 - 2²⁰ = 1134502423 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 (1135550399) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 96182 + ... + 107340.

It is an arithmetic number, because the mean of its divisors is an integer number (71822660).

Almost surely, 2^1135550999 is an apocalyptic number.

1135550999 is a deficient number, since it is larger than the sum of its proper divisors (157256881).

1135550999 is a wasteful number, since it uses less digits than its factorization.

1135550999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11239 (or 11199 counting only the distinct ones).

The product of its (nonzero) digits is 273375, while the sum is 47.

The square root of 1135550999 is about 33697.9376075154. The cubic root of 1135550999 is about 1043.2832013824.

The spelling of 1135550999 in words is "one billion, one hundred thirty-five million, five hundred fifty thousand, nine hundred ninety-nine".