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18680160061 = 194364735339
BaseRepresentation
bin10001011001011011…
…001001111100111101
31210012212000110020001
4101121123021330331
5301224110110221
612325340354301
71230624512023
oct213133117475
953185013201
1018680160061
117a16510812
123753b45991
1319b9114364
14c92cbc713
15744e5c391
hex4596c9f3d

18680160061 has 16 divisors (see below), whose sum is σ = 20152281600. Its totient is φ = 17258231088.

The previous prime is 18680160047. The next prime is 18680160119. The reversal of 18680160061 is 16006108681.

It is a happy number.

It is not a de Polignac number, because 18680160061 - 27 = 18680159933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18680160061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680160361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510930 + ... + 546268.

It is an arithmetic number, because the mean of its divisors is an integer number (1259517600).

Almost surely, 218680160061 is an apocalyptic number.

It is an amenable number.

18680160061 is a deficient number, since it is larger than the sum of its proper divisors (1472121539).

18680160061 is a wasteful number, since it uses less digits than its factorization.

18680160061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36048.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 18680160061 in words is "eighteen billion, six hundred eighty million, one hundred sixty thousand, sixty-one".

Divisors: 1 19 43 647 817 12293 27821 35339 528599 671441 1519577 22864333 28871963 434422327 983166319 18680160061