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29997985039749 = 328340157945167
BaseRepresentation
bin1101101001000011100110…
…01111100000010110000101
310221012210001011012011122200
412310201303033200112011
512412441333132232444
6143444514543345113
76214166014455426
oct664416317402605
9127183034164580
1029997985039749
11961608a566651
1234459885b2199
131397a4ab5768c
14759ca591964d
153704b2e5d969
hex1b48733e0585

29997985039749 has 12 divisors (see below), whose sum is σ = 43852476123456. Its totient is φ = 19757709021672.

The previous prime is 29997985039723. The next prime is 29997985039801. The reversal of 29997985039749 is 94793058979992.

29997985039749 is a `hidden beast` number, since 2 + 9 + 9 + 9 + 7 + 9 + 8 + 503 + 97 + 4 + 9 = 666.

It is not a de Polignac number, because 29997985039749 - 25 = 29997985039717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997985019749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20078971837 + ... + 20078973330.

It is an arithmetic number, because the mean of its divisors is an integer number (3654373010288).

Almost surely, 229997985039749 is an apocalyptic number.

It is an amenable number.

29997985039749 is a deficient number, since it is larger than the sum of its proper divisors (13854491083707).

29997985039749 is a wasteful number, since it uses less digits than its factorization.

29997985039749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40157945256 (or 40157945253 counting only the distinct ones).

The product of its (nonzero) digits is 24998984640, while the sum is 90.

The spelling of 29997985039749 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred eighty-five million, thirty-nine thousand, seven hundred forty-nine".

Divisors: 1 3 9 83 249 747 40157945167 120473835501 361421506503 3333109448861 9999328346583 29997985039749