806389206625 has 8 divisors (see below), whose sum is σ = 1006373730024. Its totient is φ = 645111365200.

The previous prime is 806389206607. The next prime is 806389206641. The reversal of 806389206625 is 526602983608.

It can be written as a sum of positive squares in 4 ways, for example, as 161787363984 + 644601842641 = 402228^2 + 802871^2 .

It is a de Polignac number, because none of the positive numbers 2^k-806389206625 is a prime.

It is a super-2 number, since 2×806389206625² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3225556702 + ... + 3225556951.

It is an arithmetic number, because the mean of its divisors is an integer number (125796716253).

Almost surely, 2^806389206625 is an apocalyptic number.

It is an amenable number.

806389206625 is a deficient number, since it is larger than the sum of its proper divisors (199984523399).

806389206625 is an equidigital number, since it uses as much as digits as its factorization.

806389206625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6451113668 (or 6451113658 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 806389206625 in words is "eight hundred six billion, three hundred eighty-nine million, two hundred six thousand, six hundred twenty-five".