17680128816 has 80 divisors (see below), whose sum is σ = 53882329088. Its totient is φ = 4888512000.

The previous prime is 17680128799. The next prime is 17680128827. The reversal of 17680128816 is 61882108671.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838285 + ... + 859116.

Almost surely, 2^17680128816 is an apocalyptic number.

17680128816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

17680128816 is an abundant number, since it is smaller than the sum of its proper divisors (36202200272).

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

17680128816 is a wasteful number, since it uses less digits than its factorization.

17680128816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697450 (or 1697444 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 17680128816 in words is "seventeen billion, six hundred eighty million, one hundred twenty-eight thousand, eight hundred sixteen".