8218053812 has 18 divisors (see below), whose sum is σ = 15178361058. Its totient is φ = 3892761648.

The previous prime is 8218053799. The next prime is 8218053863. The reversal of 8218053812 is 2183508128.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6145619236 + 2072434576 = 78394^2 + 45524^2 .

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2844143 + ... + 2847030.

It is an arithmetic number, because the mean of its divisors is an integer number (843242281).

Almost surely, 2^8218053812 is an apocalyptic number.

It is an amenable number.

8218053812 is a deficient number, since it is larger than the sum of its proper divisors (6960307246).

8218053812 is a wasteful number, since it uses less digits than its factorization.

8218053812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691215 (or 5691194 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 8218053812 is about 90653.4820732221. The cubic root of 8218053812 is about 2018.0085110747.

The spelling of 8218053812 in words is "eight billion, two hundred eighteen million, fifty-three thousand, eight hundred twelve".