47897908218 has 12 divisors (see below), whose sum is σ = 103778801178. Its totient is φ = 15965969400.

The previous prime is 47897908211. The next prime is 47897908229. The reversal of 47897908218 is 81280979874.

47897908218 is a `hidden beast` number, since 478 + 9 + 79 + 0 + 82 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43821979569 + 4075928649 = 209337^2 + 63843^2 .

It is a super-2 number, since 2×47897908218² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47897908211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1330497433 + ... + 1330497468.

Almost surely, 2^47897908218 is an apocalyptic number.

47897908218 is an abundant number, since it is smaller than the sum of its proper divisors (55880892960).

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

47897908218 is a wasteful number, since it uses less digits than its factorization.

47897908218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660994909 (or 2660994906 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 63.

The spelling of 47897908218 in words is "forty-seven billion, eight hundred ninety-seven million, nine hundred eight thousand, two hundred eighteen".