1115765643 has 8 divisors (see below), whose sum is σ = 1490902528. Its totient is φ = 742236264.

The previous prime is 1115765611. The next prime is 1115765647. The reversal of 1115765643 is 3465675111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1115765643 - 2⁵ = 1115765611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115765647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400255 + ... + 403032.

It is an arithmetic number, because the mean of its divisors is an integer number (186362816).

Almost surely, 2^1115765643 is an apocalyptic number.

1115765643 is a deficient number, since it is larger than the sum of its proper divisors (375136885).

1115765643 is an equidigital number, since it uses as much as digits as its factorization.

1115765643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803753.

The product of its digits is 75600, while the sum is 39.

The square root of 1115765643 is about 33403.0783461644. The cubic root of 1115765643 is about 1037.1884251019.

The spelling of 1115765643 in words is "one billion, one hundred fifteen million, seven hundred sixty-five thousand, six hundred forty-three".