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2166221655193 = 6135511830413
BaseRepresentation
bin11111100001011100110…
…111110100110010011001
321200002101201012211101211
4133201130313310302121
5240442410220431233
64335052023543121
7312334664155501
oct37413467646231
97602351184354
102166221655193
11765764718642
122ab9b32baaa1
1312937379696b
1476bba7d0a01
153b535c885cd
hex1f85cdf4c99

2166221655193 has 4 divisors (see below), whose sum is σ = 2201733485668. Its totient is φ = 2130709824720.

The previous prime is 2166221655187. The next prime is 2166221655211. The reversal of 2166221655193 is 3915561226612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 869235499584 + 1296986155609 = 932328^2 + 1138853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2166221655193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166221655133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17755915146 + ... + 17755915267.

It is an arithmetic number, because the mean of its divisors is an integer number (550433371417).

Almost surely, 22166221655193 is an apocalyptic number.

It is an amenable number.

2166221655193 is a deficient number, since it is larger than the sum of its proper divisors (35511830475).

2166221655193 is an equidigital number, since it uses as much as digits as its factorization.

2166221655193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35511830474.

The product of its digits is 1166400, while the sum is 49.

The spelling of 2166221655193 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, one hundred ninety-three".

Divisors: 1 61 35511830413 2166221655193