1115845809 has 16 divisors (see below), whose sum is σ = 1602972672. Its totient is φ = 686360448.

The previous prime is 1115845769. The next prime is 1115845853. The reversal of 1115845809 is 9085485111.

It is not a de Polignac number, because 1115845809 - 2⁷ = 1115845681 is a prime.

It is a super-2 number, since 2×1115845809² = 2490223738925728962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1115845109) 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, 103152 + ... + 113454.

It is an arithmetic number, because the mean of its divisors is an integer number (100185792).

Almost surely, 2^1115845809 is an apocalyptic number.

It is an amenable number.

1115845809 is a deficient number, since it is larger than the sum of its proper divisors (487126863).

1115845809 is a wasteful number, since it uses less digits than its factorization.

1115845809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13096.

The product of its (nonzero) digits is 57600, while the sum is 42.

The square root of 1115845809 is about 33404.2783038341. The cubic root of 1115845809 is about 1037.2132646240.

The spelling of 1115845809 in words is "one billion, one hundred fifteen million, eight hundred forty-five thousand, eight hundred nine".