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72989259871 = 1113947736599
BaseRepresentation
bin100001111111001111…
…1111011100001011111
320222101202011120112011
41003332133323201133
52143440222303441
653310353052051
75162512321003
oct1037637734137
9228352146464
1072989259871
1128a55597280
121218bb57027
136b6283b488
143765a24703
151d72c82581
hex10fe7fb85f

72989259871 has 8 divisors (see below), whose sum is σ = 80197488000. Its totient is φ = 65876505240.

The previous prime is 72989259869. The next prime is 72989259877. The reversal of 72989259871 is 17895298927.

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

It is a cyclic number.

It is not a de Polignac number, because 72989259871 - 21 = 72989259869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72989259797 and 72989259806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72989259877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23866771 + ... + 23869828.

It is an arithmetic number, because the mean of its divisors is an integer number (10024686000).

Almost surely, 272989259871 is an apocalyptic number.

72989259871 is a deficient number, since it is larger than the sum of its proper divisors (7208228129).

72989259871 is a wasteful number, since it uses less digits than its factorization.

72989259871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47736749.

The product of its digits is 45722880, while the sum is 67.

The spelling of 72989259871 in words is "seventy-two billion, nine hundred eighty-nine million, two hundred fifty-nine thousand, eight hundred seventy-one".

Divisors: 1 11 139 1529 47736599 525102589 6635387261 72989259871