16784270053321 has 9 divisors (see below), whose sum is σ = 16999746330861. Its totient is φ = 16571491383564.

The previous prime is 16784270053301. The next prime is 16784270053349. The reversal of 16784270053321 is 12335007248761.

The square root of 16784270053321 is 4096861.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 16784270053321 - 2¹¹ = 16784270051273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16784270053301) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 323626090 + ... + 323677948.

It is an arithmetic number, because the mean of its divisors is an integer number (1888860703429).

Almost surely, 2^{16784270053321} is an apocalyptic number.

16784270053321 is the 4096861-st square number.

16784270053321 is the 2048431-st centered octagonal number.

It is an amenable number.

16784270053321 is a deficient number, since it is larger than the sum of its proper divisors (215476277540).

16784270053321 is an frugal number, since it uses more digits than its factorization.

16784270053321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103876 (or 51938 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

Multiplying 16784270053321 by its sum of digits (49), we get a square (822429232612729 = 28678027²).

The spelling of 16784270053321 in words is "sixteen trillion, seven hundred eighty-four billion, two hundred seventy million, fifty-three thousand, three hundred twenty-one".