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30765853105 = 5131727842401
BaseRepresentation
bin11100101001110010…
…011010100110110001
32221102010101021022221
4130221302122212301
51001002024244410
622044511001041
72136256302511
oct345162324661
987363337287
1030765853105
1112058581889
125b67509181
132b93c50610
1416bc045841
15c00ea84da
hex729c9a9b1

30765853105 has 16 divisors (see below), whose sum is σ = 42097711824. Its totient is φ = 21382963200.

The previous prime is 30765853103. The next prime is 30765853133. The reversal of 30765853105 is 50135856703.

It can be written as a sum of positive squares in 8 ways, for example, as 789778609 + 29976074496 = 28103^2 + 173136^2 .

It is not a de Polignac number, because 30765853105 - 21 = 30765853103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30765853103) 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, 13920096 + ... + 13922305.

It is an arithmetic number, because the mean of its divisors is an integer number (2631106989).

Almost surely, 230765853105 is an apocalyptic number.

It is an amenable number.

30765853105 is a deficient number, since it is larger than the sum of its proper divisors (11331858719).

30765853105 is a wasteful number, since it uses less digits than its factorization.

30765853105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27842436.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 30765853105 in words is "thirty billion, seven hundred sixty-five million, eight hundred fifty-three thousand, one hundred five".

Divisors: 1 5 13 17 65 85 221 1105 27842401 139212005 361951213 473320817 1809756065 2366604085 6153170621 30765853105