16558163190912 has 128 divisors (see below), whose sum is σ = 50298441845760. Its totient is φ = 4727836541952.

The previous prime is 16558163190869. The next prime is 16558163190931. The reversal of 16558163190912 is 21909136185561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (57) 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 15 ways as a sum of consecutive naturals, for example, 2151463 + ... + 6143705.

It is an arithmetic number, because the mean of its divisors is an integer number (392956576920).

Almost surely, 2^{16558163190912} is an apocalyptic number.

16558163190912 is a gapful number since it is divisible by the number (12) 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 16558163190912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25149220922880).

16558163190912 is an abundant number, since it is smaller than the sum of its proper divisors (33740278654848).

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

16558163190912 is a wasteful number, since it uses less digits than its factorization.

16558163190912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993810 (or 3993798 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 57.

The spelling of 16558163190912 in words is "sixteen trillion, five hundred fifty-eight billion, one hundred sixty-three million, one hundred ninety thousand, nine hundred twelve".