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69499495471 = 779699117977
BaseRepresentation
bin100000010111001111…
…1100010010000101111
320122101112120011201211
41000232133202100233
52114313332323341
651532211215251
75010155651530
oct1005637422057
9218345504654
1069499495471
112752472066a
12115772a7527
136727846a23
14351436c687
151c1b6e8181
hex102e7e242f

69499495471 has 16 divisors (see below), whose sum is σ = 80449392640. Its totient is φ = 58805248320.

The previous prime is 69499495469. The next prime is 69499495493. The reversal of 69499495471 is 17459499496.

It is not a de Polignac number, because 69499495471 - 21 = 69499495469 is a prime.

It is a super-3 number, since 3×694994954713 (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69499495397 and 69499495406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69499495171) 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, 3857035 + ... + 3875011.

It is an arithmetic number, because the mean of its divisors is an integer number (5028087040).

Almost surely, 269499495471 is an apocalyptic number.

69499495471 is a deficient number, since it is larger than the sum of its proper divisors (10949897169).

69499495471 is a wasteful number, since it uses less digits than its factorization.

69499495471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25054.

The product of its digits is 88179840, while the sum is 67.

The spelling of 69499495471 in words is "sixty-nine billion, four hundred ninety-nine million, four hundred ninety-five thousand, four hundred seventy-one".

Divisors: 1 7 79 553 6991 17977 48937 125839 552289 1420183 3866023 9941281 125677207 879740449 9928499353 69499495471