8421708755 has 8 divisors (see below), whose sum is σ = 10206111024. Its totient is φ = 6670660000.

The previous prime is 8421708733. The next prime is 8421708769. The reversal of 8421708755 is 5578071248.

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

It is not a de Polignac number, because 8421708755 - 2⁸ = 8421708499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8337821 + ... + 8338830.

It is an arithmetic number, because the mean of its divisors is an integer number (1275763878).

Almost surely, 2^8421708755 is an apocalyptic number.

8421708755 is a deficient number, since it is larger than the sum of its proper divisors (1784402269).

8421708755 is a wasteful number, since it uses less digits than its factorization.

8421708755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16676757.

The product of its (nonzero) digits is 627200, while the sum is 47.

The square root of 8421708755 is about 91769.8684482004. The cubic root of 8421708755 is about 2034.5423738609.

The spelling of 8421708755 in words is "eight billion, four hundred twenty-one million, seven hundred eight thousand, seven hundred fifty-five".