806146823885 has 16 divisors (see below), whose sum is σ = 1103071492656. Its totient is φ = 560290280448.

The previous prime is 806146823863. The next prime is 806146823893. The reversal of 806146823885 is 588328641608.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 34943198761 + 771203625124 = 186931^2 + 878182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-806146823885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364771214 + ... + 364773423.

It is an arithmetic number, because the mean of its divisors is an integer number (68941968291).

Almost surely, 2^806146823885 is an apocalyptic number.

806146823885 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

806146823885 is a deficient number, since it is larger than the sum of its proper divisors (296924668771).

806146823885 is a wasteful number, since it uses less digits than its factorization.

806146823885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729544672.

The product of its (nonzero) digits is 17694720, while the sum is 59.

The spelling of 806146823885 in words is "eight hundred six billion, one hundred forty-six million, eight hundred twenty-three thousand, eight hundred eighty-five".