1150818509 has 4 divisors (see below), whose sum is σ = 1151121504. Its totient is φ = 1150515516.

The previous prime is 1150818479. The next prime is 1150818523. The reversal of 1150818509 is 9058180511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9058180511 = 3089 ⋅2932399.

It is a cyclic number.

It is not a de Polignac number, because 1150818509 - 2²⁸ = 882383053 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 (1150818569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145727 + ... + 153420.

It is an arithmetic number, because the mean of its divisors is an integer number (287780376).

Almost surely, 2^1150818509 is an apocalyptic number.

It is an amenable number.

1150818509 is a deficient number, since it is larger than the sum of its proper divisors (302995).

1150818509 is an equidigital number, since it uses as much as digits as its factorization.

1150818509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302994.

The product of its (nonzero) digits is 14400, while the sum is 38.

The square root of 1150818509 is about 33923.7160258130. The cubic root of 1150818509 is about 1047.9380575072.

The spelling of 1150818509 in words is "one billion, one hundred fifty million, eight hundred eighteen thousand, five hundred nine".