806420820464 has 20 divisors (see below), whose sum is σ = 1785646102704. Its totient is φ = 345608923008.

The previous prime is 806420820461. The next prime is 806420820497. The reversal of 806420820464 is 464028024608.

It is a super-3 number, since 3×806420820464³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806420820461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3600092837 + ... + 3600093060.

Almost surely, 2^806420820464 is an apocalyptic number.

It is an amenable number.

806420820464 is an abundant number, since it is smaller than the sum of its proper divisors (979225282240).

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

806420820464 is a wasteful number, since it uses less digits than its factorization.

806420820464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200185912 (or 7200185906 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 44.

The spelling of 806420820464 in words is "eight hundred six billion, four hundred twenty million, eight hundred twenty thousand, four hundred sixty-four".