16789821572 has 6 divisors (see below), whose sum is σ = 29382187758. Its totient is φ = 8394910784.

The previous prime is 16789821569. The next prime is 16789821583. The reversal of 16789821572 is 27512898761.

It can be written as a sum of positive squares in only one way, i.e., 12211134016 + 4578687556 = 110504^2 + 67666^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2098727693 + ... + 2098727700.

It is an arithmetic number, because the mean of its divisors is an integer number (4897031293).

Almost surely, 2^16789821572 is an apocalyptic number.

It is an amenable number.

16789821572 is a deficient number, since it is larger than the sum of its proper divisors (12592366186).

16789821572 is a wasteful number, since it uses less digits than its factorization.

16789821572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197455397 (or 4197455395 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 56.

The spelling of 16789821572 in words is "sixteen billion, seven hundred eighty-nine million, eight hundred twenty-one thousand, five hundred seventy-two".