8858267721 has 12 divisors (see below), whose sum is σ = 12921962820. Its totient is φ = 5847040800.

The previous prime is 8858267687. The next prime is 8858267767. The reversal of 8858267721 is 1277628588.

It can be written as a sum of positive squares in 2 ways, for example, as 8214884496 + 643383225 = 90636^2 + 25365^2 .

It is not a de Polignac number, because 8858267721 - 2¹⁵ = 8858234953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8858267221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4871626 + ... + 4873443.

It is an arithmetic number, because the mean of its divisors is an integer number (1076830235).

Almost surely, 2^8858267721 is an apocalyptic number.

It is an amenable number.

8858267721 is a deficient number, since it is larger than the sum of its proper divisors (4063695099).

8858267721 is a wasteful number, since it uses less digits than its factorization.

8858267721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9745176 (or 9745173 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The square root of 8858267721 is about 94118.3707944416. The cubic root of 8858267721 is about 2069.1069234369.

The spelling of 8858267721 in words is "eight billion, eight hundred fifty-eight million, two hundred sixty-seven thousand, seven hundred twenty-one".