8825128921 has 16 divisors (see below), whose sum is σ = 10228945408. Its totient is φ = 7457184000.

The previous prime is 8825128919. The next prime is 8825128933. The reversal of 8825128921 is 1298215288.

It is not a de Polignac number, because 8825128921 - 2¹ = 8825128919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8825128121) 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, 2098621 + ... + 2102821.

It is an arithmetic number, because the mean of its divisors is an integer number (639309088).

Almost surely, 2^8825128921 is an apocalyptic number.

It is an amenable number.

8825128921 is a deficient number, since it is larger than the sum of its proper divisors (1403816487).

8825128921 is a wasteful number, since it uses less digits than its factorization.

8825128921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8392.

The product of its digits is 184320, while the sum is 46.

The square root of 8825128921 is about 93942.1573150202. The cubic root of 8825128921 is about 2066.5235213231.

The spelling of 8825128921 in words is "eight billion, eight hundred twenty-five million, one hundred twenty-eight thousand, nine hundred twenty-one".