1140817785 has 8 divisors (see below), whose sum is σ = 1825308480. Its totient is φ = 608436144.

The previous prime is 1140817771. The next prime is 1140817787. The reversal of 1140817785 is 5877180411.

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

It is not a de Polignac number, because 1140817785 - 2⁸ = 1140817529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1140817787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38027245 + ... + 38027274.

It is an arithmetic number, because the mean of its divisors is an integer number (228163560).

Almost surely, 2^1140817785 is an apocalyptic number.

1140817785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1140817785 is a deficient number, since it is larger than the sum of its proper divisors (684490695).

1140817785 is an equidigital number, since it uses as much as digits as its factorization.

1140817785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76054527.

The product of its (nonzero) digits is 62720, while the sum is 42.

The square root of 1140817785 is about 33775.9942118659. The cubic root of 1140817785 is about 1044.8936607222.

The spelling of 1140817785 in words is "one billion, one hundred forty million, eight hundred seventeen thousand, seven hundred eighty-five".