Search a number
-
+
16169041921 = 173761421409
BaseRepresentation
bin11110000111100000…
…00000000000000001
31112201211220102201111
433003300000000001
5231103233320141
611232234403321
71111453405624
oct170360000001
945654812644
1016169041921
11694800356a
123172b90541
1316a8ac1436
14ad55b5dbb
15649787381
hex3c3c00001

16169041921 has 16 divisors (see below), whose sum is σ = 17871155280. Its totient is φ = 14563860480.

The previous prime is 16169041913. The next prime is 16169041927. The reversal of 16169041921 is 12914096161.

It can be written as a sum of positive squares in 8 ways, for example, as 117418896 + 16051623025 = 10836^2 + 126695^2 .

It is a cyclic number.

It is not a de Polignac number, because 16169041921 - 23 = 16169041913 is a prime.

It is a super-2 number, since 2×161690419212 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16169041927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172336 + ... + 249073.

It is an arithmetic number, because the mean of its divisors is an integer number (1116947205).

It is a Proth number, since it is equal to 3855 ⋅ 222 + 1 and 3855 < 222.

Almost surely, 216169041921 is an apocalyptic number.

It is an amenable number.

16169041921 is a deficient number, since it is larger than the sum of its proper divisors (1702113359).

16169041921 is a wasteful number, since it uses less digits than its factorization.

16169041921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421524.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 16169041921 in words is "sixteen billion, one hundred sixty-nine million, forty-one thousand, nine hundred twenty-one".

Divisors: 1 17 37 61 629 1037 2257 38369 421409 7163953 15592133 25705949 265066261 437001133 951120113 16169041921