8216587446018 has 48 divisors (see below), whose sum is σ = 19291519748160. Its totient is φ = 2326058822304.

The previous prime is 8216587446013. The next prime is 8216587446019. The reversal of 8216587446018 is 8106447856128.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8216587446013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128167846 + ... + 128231937.

It is an arithmetic number, because the mean of its divisors is an integer number (401906661420).

Almost surely, 2^{8216587446018} is an apocalyptic number.

8216587446018 is an abundant number, since it is smaller than the sum of its proper divisors (11074932302142).

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

8216587446018 is a wasteful number, since it uses less digits than its factorization.

8216587446018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256399911 (or 256399904 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 60.

The spelling of 8216587446018 in words is "eight trillion, two hundred sixteen billion, five hundred eighty-seven million, four hundred forty-six thousand, eighteen".