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8912437681 = 71996398017
BaseRepresentation
bin10000100110011100…
…10000000110110001
3212000010022202002111
420103032100012301
5121223041001211
64032212245321
7433600320220
oct102316200661
925003282074
108912437681
113863925384
121888910841
13ac05a2a84
14607940cb7
15372682421
hex2133901b1

8912437681 has 8 divisors (see below), whose sum is σ = 10236828800. Its totient is φ = 7600843008.

The previous prime is 8912437669. The next prime is 8912437687. The reversal of 8912437681 is 1867342198.

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 8912437681 - 25 = 8912437649 is a prime.

It is a super-2 number, since 2×89124376812 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8912437687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3197616 + ... + 3200401.

It is an arithmetic number, because the mean of its divisors is an integer number (1279603600).

Almost surely, 28912437681 is an apocalyptic number.

It is an amenable number.

8912437681 is a deficient number, since it is larger than the sum of its proper divisors (1324391119).

8912437681 is a wasteful number, since it uses less digits than its factorization.

8912437681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398223.

The product of its digits is 580608, while the sum is 49.

The square root of 8912437681 is about 94405.7078835809. The cubic root of 8912437681 is about 2073.3160135758.

The spelling of 8912437681 in words is "eight billion, nine hundred twelve million, four hundred thirty-seven thousand, six hundred eighty-one".

Divisors: 1 7 199 1393 6398017 44786119 1273205383 8912437681