16950520644201 has 81 divisors (see below), whose sum is σ = 26081729363781. Its totient is φ = 10607496637248.

The previous prime is 16950520644181. The next prime is 16950520644229. The reversal of 16950520644201 is 10244602505961.

The square root of 16950520644201 is 4117101.

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

16950520644201 is a `hidden beast` number, since 1 + 69 + 5 + 0 + 520 + 6 + 44 + 20 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3607397469225 + 13343123174976 = 1899315^2 + 3652824^2 .

It is not a de Polignac number, because 16950520644201 - 2⁹ = 16950520643689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16950520644251) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 13252947480 + ... + 13252948758.

Almost surely, 2^{16950520644201} is an apocalyptic number.

16950520644201 is the 4117101-st square number.

16950520644201 is the 2058551-st centered octagonal number.

It is an amenable number.

16950520644201 is a deficient number, since it is larger than the sum of its proper divisors (9131208719580).

16950520644201 is an frugal number, since it uses more digits than its factorization.

16950520644201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 16950520644201 in words is "sixteen trillion, nine hundred fifty billion, five hundred twenty million, six hundred forty-four thousand, two hundred one".