1150551999 has 8 divisors (see below), whose sum is σ = 1704521520. Its totient is φ = 767034648.

The previous prime is 1150551943. The next prime is 1150552009. The reversal of 1150551999 is 9991550511.

1150551999 is a `hidden beast` number, since 1 + 1 + 5 + 0 + 551 + 9 + 99 = 666.

It is not a de Polignac number, because 1150551999 - 2⁹ = 1150551487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150551599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21306492 + ... + 21306545.

It is an arithmetic number, because the mean of its divisors is an integer number (213065190).

Almost surely, 2^1150551999 is an apocalyptic number.

1150551999 is a deficient number, since it is larger than the sum of its proper divisors (553969521).

1150551999 is an equidigital number, since it uses as much as digits as its factorization.

1150551999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42613046 (or 42613040 counting only the distinct ones).

The product of its (nonzero) digits is 91125, while the sum is 45.

The square root of 1150551999 is about 33919.7877204442. The cubic root of 1150551999 is about 1047.8571563829.

It can be divided in two parts, 11505 and 51999, that added together give a square (63504 = 252²).

The spelling of 1150551999 in words is "one billion, one hundred fifty million, five hundred fifty-one thousand, nine hundred ninety-nine".