16671603317688 has 256 divisors, whose sum is σ = 51850196928000. Its totient is φ = 4920676992000.

The previous prime is 16671603317627. The next prime is 16671603317711. The reversal of 16671603317688 is 88671330617661.

It is a happy number.

16671603317688 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 1 + 603 + 3 + 17 + 6 + 8 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13579738 + ... + 14756438.

It is an arithmetic number, because the mean of its divisors is an integer number (202539831750).

Almost surely, 2^{16671603317688} is an apocalyptic number.

16671603317688 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 16671603317688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25925098464000).

16671603317688 is an abundant number, since it is smaller than the sum of its proper divisors (35178593610312).

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

16671603317688 is a wasteful number, since it uses less digits than its factorization.

16671603317688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176883 (or 1176873 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 16671603317688 in words is "sixteen trillion, six hundred seventy-one billion, six hundred three million, three hundred seventeen thousand, six hundred eighty-eight".