17870868648 has 160 divisors (see below), whose sum is σ = 50731544160. Its totient is φ = 5876945280.

The previous prime is 17870868643. The next prime is 17870868649. The reversal of 17870868648 is 84686807871.

It is not an unprimeable number, because it can be changed into a prime (17870868641) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25861983 + ... + 25862673.

It is an arithmetic number, because the mean of its divisors is an integer number (317072151).

Almost surely, 2^17870868648 is an apocalyptic number.

17870868648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17870868648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25365772080).

17870868648 is an abundant number, since it is smaller than the sum of its proper divisors (32860675512).

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

17870868648 is a wasteful number, since it uses less digits than its factorization.

17870868648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 28901376, while the sum is 63.

The spelling of 17870868648 in words is "seventeen billion, eight hundred seventy million, eight hundred sixty-eight thousand, six hundred forty-eight".