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68409985222 = 2191800262769
BaseRepresentation
bin111111101101100011…
…011000100011000110
320112120121110022122101
4333231203120203012
52110100424011342
651232131222314
74641156165025
oct775543304306
9215517408571
1068409985222
1127015720477
121131244799a
1365b2bc97c7
14344d7a08bc
151ba5c353b7
hexfed8d88c6

68409985222 has 8 divisors (see below), whose sum is σ = 108015766200. Its totient is φ = 32404729824.

The previous prime is 68409985219. The next prime is 68409985223. The reversal of 68409985222 is 22258990486.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×684099852223 (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68409985223) 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, 900131347 + ... + 900131422.

It is an arithmetic number, because the mean of its divisors is an integer number (13501970775).

Almost surely, 268409985222 is an apocalyptic number.

68409985222 is a deficient number, since it is larger than the sum of its proper divisors (39605780978).

68409985222 is a wasteful number, since it uses less digits than its factorization.

68409985222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800262790.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 68409985222 in words is "sixty-eight billion, four hundred nine million, nine hundred eighty-five thousand, two hundred twenty-two".

Divisors: 1 2 19 38 1800262769 3600525538 34204992611 68409985222