8566215652240 has 20 divisors (see below), whose sum is σ = 19916451391644. Its totient is φ = 3426486260864.

The previous prime is 8566215652237. The next prime is 8566215652249. The reversal of 8566215652240 is 422565126658.

It can be written as a sum of positive squares in 2 ways, for example, as 4040759306896 + 4525456345344 = 2010164^2 + 2127312^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (8566215652249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53538847747 + ... + 53538847906.

Almost surely, 2^{8566215652240} is an apocalyptic number.

8566215652240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8566215652240 is an abundant number, since it is smaller than the sum of its proper divisors (11350235739404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8566215652240 is a wasteful number, since it uses less digits than its factorization.

8566215652240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107077695666 (or 107077695660 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 8566215652240 in words is "eight trillion, five hundred sixty-six billion, two hundred fifteen million, six hundred fifty-two thousand, two hundred forty".