8218299905 has 8 divisors (see below), whose sum is σ = 9867700584. Its totient is φ = 6570812800.

The previous prime is 8218299893. The next prime is 8218299911. The reversal of 8218299905 is 5099928128.

It can be written as a sum of positive squares in 4 ways, for example, as 3546440704 + 4671859201 = 59552^2 + 68351^2 .

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

It is not a de Polignac number, because 8218299905 - 2⁴ = 8218299889 is a prime.

It is a Duffinian number.

It is a Curzon 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, 468926 + ... + 486135.

It is an arithmetic number, because the mean of its divisors is an integer number (1233462573).

Almost surely, 2^8218299905 is an apocalyptic number.

It is an amenable number.

8218299905 is a deficient number, since it is larger than the sum of its proper divisors (1649400679).

8218299905 is a wasteful number, since it uses less digits than its factorization.

8218299905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956787.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 8218299905 is about 90654.8393909558. The cubic root of 8218299905 is about 2018.0286542385.

The spelling of 8218299905 in words is "eight billion, two hundred eighteen million, two hundred ninety-nine thousand, nine hundred five".