806408868021 has 16 divisors (see below), whose sum is σ = 1113076339200. Its totient is φ = 518773037760.

The previous prime is 806408867977. The next prime is 806408868037. The reversal of 806408868021 is 120868804608.

It is not a de Polignac number, because 806408868021 - 2¹³ = 806408859829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806408868091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12390270 + ... + 12455183.

It is an arithmetic number, because the mean of its divisors is an integer number (69567271200).

Almost surely, 2^806408868021 is an apocalyptic number.

It is an amenable number.

806408868021 is a deficient number, since it is larger than the sum of its proper divisors (306667471179).

806408868021 is a wasteful number, since it uses less digits than its factorization.

806408868021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24845836.

The product of its (nonzero) digits is 1179648, while the sum is 51.

The spelling of 806408868021 in words is "eight hundred six billion, four hundred eight million, eight hundred sixty-eight thousand, twenty-one".