16510089954121 has 9 divisors (see below), whose sum is σ = 16528187209261. Its totient is φ = 16492012505932.

The previous prime is 16510089954107. The next prime is 16510089954157. The reversal of 16510089954121 is 12145998001561.

The square root of 16510089954121 is 4063261.

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

It is not a de Polignac number, because 16510089954121 - 2¹³ = 16510089945929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16510089954101) 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, 5213162280 + ... + 5213165446.

Almost surely, 2^{16510089954121} is an apocalyptic number.

16510089954121 is the 4063261-st square number.

16510089954121 is the 2031631-st centered octagonal number.

It is an amenable number.

16510089954121 is a deficient number, since it is larger than the sum of its proper divisors (18097255140).

16510089954121 is an frugal number, since it uses more digits than its factorization.

16510089954121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 52.

The spelling of 16510089954121 in words is "sixteen trillion, five hundred ten billion, eighty-nine million, nine hundred fifty-four thousand, one hundred twenty-one".