85781782823 has 8 divisors (see below), whose sum is σ = 94102922880. Its totient is φ = 77547775480.

The previous prime is 85781782817. The next prime is 85781782837. The reversal of 85781782823 is 32828718758.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85781782823 - 2¹⁴ = 85781766439 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 (85781785823) 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, 21781115 + ... + 21785052.

It is an arithmetic number, because the mean of its divisors is an integer number (11762865360).

Almost surely, 2^85781782823 is an apocalyptic number.

85781782823 is a deficient number, since it is larger than the sum of its proper divisors (8321140057).

85781782823 is a wasteful number, since it uses less digits than its factorization.

85781782823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43566357.

The product of its digits is 12042240, while the sum is 59.

The spelling of 85781782823 in words is "eighty-five billion, seven hundred eighty-one million, seven hundred eighty-two thousand, eight hundred twenty-three".