16505021066522 has 16 divisors (see below), whose sum is σ = 24786319475112. Its totient is φ = 8242915000320.

The previous prime is 16505021066519. The next prime is 16505021066531. The reversal of 16505021066522 is 22566012050561.

It can be written as a sum of positive squares in 4 ways, for example, as 11077188154081 + 5427832912441 = 3328241^2 + 2329771^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16505021066522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111060938 + ... + 111209450.

Almost surely, 2^{16505021066522} is an apocalyptic number.

16505021066522 is a deficient number, since it is larger than the sum of its proper divisors (8281298408590).

16505021066522 is a wasteful number, since it uses less digits than its factorization.

16505021066522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212753.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 16505021066522 in words is "sixteen trillion, five hundred five billion, twenty-one million, sixty-six thousand, five hundred twenty-two".