17978009160 has 128 divisors (see below), whose sum is σ = 55615351680. Its totient is φ = 4646873088.

The previous prime is 17978009131. The next prime is 17978009173. The reversal of 17978009160 is 6190087971.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510852 + ... + 544908.

It is an arithmetic number, because the mean of its divisors is an integer number (434494935).

Almost surely, 2^17978009160 is an apocalyptic number.

17978009160 is a gapful number since it is divisible by the number (10) 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 17978009160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27807675840).

17978009160 is an abundant number, since it is smaller than the sum of its proper divisors (37637342520).

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

17978009160 is a wasteful number, since it uses less digits than its factorization.

17978009160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34207 (or 34203 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 48.

The spelling of 17978009160 in words is "seventeen billion, nine hundred seventy-eight million, nine thousand, one hundred sixty".