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29991679623 = 3310123114759
BaseRepresentation
bin11011111011101001…
…001011011010000111
32212102011122011222000
4123323221023122013
5442410332221443
621440013440343
72111136033123
oct337351133207
985364564860
1029991679623
11117a0580894
1259901a00b3
132a9c740bb9
1416472c0583
15ba80338d3
hex6fba4b687

29991679623 has 32 divisors (see below), whose sum is σ = 44900889600. Its totient is φ = 19783764000.

The previous prime is 29991679573. The next prime is 29991679631. The reversal of 29991679623 is 32697619992.

It is not a de Polignac number, because 29991679623 - 210 = 29991678599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29991679673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6299718 + ... + 6304476.

It is an arithmetic number, because the mean of its divisors is an integer number (1403152800).

Almost surely, 229991679623 is an apocalyptic number.

29991679623 is a deficient number, since it is larger than the sum of its proper divisors (14909209977).

29991679623 is a wasteful number, since it uses less digits than its factorization.

29991679623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7180 (or 7174 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The spelling of 29991679623 in words is "twenty-nine billion, nine hundred ninety-one million, six hundred seventy-nine thousand, six hundred twenty-three".

Divisors: 1 3 9 27 101 303 909 2311 2727 4759 6933 14277 20799 42831 62397 128493 233411 480659 700233 1441977 2100699 4325931 6302097 10998049 12977793 32994147 98982441 296947323 1110802949 3332408847 9997226541 29991679623