806559223698 has 18 divisors (see below), whose sum is σ = 1747553240277. Its totient is φ = 268851804480.

The previous prime is 806559223661. The next prime is 806559223711. The reversal of 806559223698 is 896322955608.

806559223698 is a `hidden beast` number, since 8 + 0 + 6 + 5 + 592 + 2 + 36 + 9 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 434804403609 + 371754820089 = 659397^2 + 609717^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=635043.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3704418 + ... + 3916098.

Almost surely, 2^806559223698 is an apocalyptic number.

806559223698 is an abundant number, since it is smaller than the sum of its proper divisors (940994016579).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806559223698 is an frugal number, since it uses more digits than its factorization.

806559223698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423370 (or 211686 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 806559223698 in words is "eight hundred six billion, five hundred fifty-nine million, two hundred twenty-three thousand, six hundred ninety-eight".