16721105042352 has 80 divisors (see below), whose sum is σ = 45737790674400. Its totient is φ = 5245762277376.

The previous prime is 16721105042309. The next prime is 16721105042371. The reversal of 16721105042352 is 25324050112761.

It is a self number, because there is not a number n which added to its sum of digits gives 16721105042352.

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, 96649558 + ... + 96822410.

It is an arithmetic number, because the mean of its divisors is an integer number (571722383430).

Almost surely, 2^{16721105042352} is an apocalyptic number.

16721105042352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16721105042352 is an abundant number, since it is smaller than the sum of its proper divisors (29016685632048).

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

16721105042352 is a wasteful number, since it uses less digits than its factorization.

16721105042352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291430 (or 291424 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 16721105042352 in words is "sixteen trillion, seven hundred twenty-one billion, one hundred five million, forty-two thousand, three hundred fifty-two".