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13250768765 = 513538274651
BaseRepresentation
bin11000101011100111…
…01010111101111101
31021012110122210112112
430111303222331331
5204114144100030
610030505543405
7646236450623
oct142563527575
937173583475
1013250768765
11568a793773
1226997a4b65
1313323232a0
148d9ba5513
15528488a95
hex315ceaf7d

13250768765 has 32 divisors (see below), whose sum is σ = 17472018816. Its totient is φ = 9586886400.

The previous prime is 13250768753. The next prime is 13250768771. The reversal of 13250768765 is 56786705231.

It is not a de Polignac number, because 13250768765 - 24 = 13250768749 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2846690 + ... + 2851340.

It is an arithmetic number, because the mean of its divisors is an integer number (546000588).

Almost surely, 213250768765 is an apocalyptic number.

It is an amenable number.

13250768765 is a deficient number, since it is larger than the sum of its proper divisors (4221250051).

13250768765 is a wasteful number, since it uses less digits than its factorization.

13250768765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 13250768765 in words is "thirteen billion, two hundred fifty million, seven hundred sixty-eight thousand, seven hundred sixty-five".

Divisors: 1 5 13 53 65 265 689 827 3445 4135 4651 10751 23255 43831 53755 60463 219155 246503 302315 569803 1232515 2849015 3204539 3846377 16022695 19231885 50002901 203857981 250014505 1019289905 2650153753 13250768765