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BaseRepresentation
bin110000110001001011…
…0011010010011001001
3101000022202120111110100
41201202112122103021
53203441142212121
6120040103240013
710365200666154
oct1414226322311
9330282514410
10104729257161
1140462a31aa1
1218369749009
139b50545369
1450d71a6c9b
152ace511026
hex186259a4c9

104729257161 has 9 divisors (see below), whose sum is σ = 151276996039. Its totient is φ = 69818857536.

The previous prime is 104729257151. The next prime is 104729257177. The reversal of 104729257161 is 161752927401.

The square root of 104729257161 is 323619.

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

104729257161 is a `hidden beast` number, since 1 + 0 + 4 + 72 + 9 + 2 + 571 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 103609953225 + 1119303936 = 321885^2 + 33456^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2k-104729257161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104729257141) 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, 916921 + ... + 1024793.

Almost surely, 2104729257161 is an apocalyptic number.

104729257161 is the 323619-th square number.

104729257161 is the 161810-th centered octagonal number.

It is an amenable number.

104729257161 is a deficient number, since it is larger than the sum of its proper divisors (46547738878).

104729257161 is an frugal number, since it uses more digits than its factorization.

104729257161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215752 (or 107876 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 104729257161 in words is "one hundred four billion, seven hundred twenty-nine million, two hundred fifty-seven thousand, one hundred sixty-one".