806721155441 has 8 divisors (see below), whose sum is σ = 823898217600. Its totient is φ = 789544625968.

The previous prime is 806721155399. The next prime is 806721155479. The reversal of 806721155441 is 144551127608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 806721155441 - 2⁶ = 806721155377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 806721155392 and 806721155401.

It is not an unprimeable number, because it can be changed into a prime (806721152441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5063210 + ... + 5220108.

It is an arithmetic number, because the mean of its divisors is an integer number (102987277200).

Almost surely, 2^806721155441 is an apocalyptic number.

It is an amenable number.

806721155441 is a deficient number, since it is larger than the sum of its proper divisors (17177062159).

806721155441 is a wasteful number, since it uses less digits than its factorization.

806721155441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266343.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 806721155441 in words is "eight hundred six billion, seven hundred twenty-one million, one hundred fifty-five thousand, four hundred forty-one".