8320398961 has 16 divisors (see below), whose sum is σ = 10415571840. Its totient is φ = 6480794880.

The previous prime is 8320398959. The next prime is 8320398991. The reversal of 8320398961 is 1698930238.

It is not a de Polignac number, because 8320398961 - 2¹ = 8320398959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8320398941) 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 15 ways as a sum of consecutive naturals, for example, 1202055 + ... + 1208956.

It is an arithmetic number, because the mean of its divisors is an integer number (650973240).

Almost surely, 2^8320398961 is an apocalyptic number.

It is an amenable number.

8320398961 is a deficient number, since it is larger than the sum of its proper divisors (2095172879).

8320398961 is a wasteful number, since it uses less digits than its factorization.

8320398961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411064.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 8320398961 is about 91216.2209313672. The cubic root of 8320398961 is about 2026.3511958317.

The spelling of 8320398961 in words is "eight billion, three hundred twenty million, three hundred ninety-eight thousand, nine hundred sixty-one".