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8213072136205 = 51797996127609
BaseRepresentation
bin111011110000100000100…
…1111110100100000001101
31002002011101010012102002111
41313201001033310200031
52034030332431324310
625245011103224021
71505242404202426
oct167410117644015
932064333172074
108213072136205
112687165119892
12b078b92a8011
13477649220c71
1420572c90664d
15e3992d3a28a
hex778413f480d

8213072136205 has 16 divisors (see below), whose sum is σ = 10543014624240. Its totient is φ = 6120208023552.

The previous prime is 8213072136173. The next prime is 8213072136221. The reversal of 8213072136205 is 5026312703128.

It can be written as a sum of positive squares in 8 ways, for example, as 34398749961 + 8178673386244 = 185469^2 + 2859838^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213072136205 - 25 = 8213072136173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498055560 + ... + 498072049.

It is an arithmetic number, because the mean of its divisors is an integer number (658938414015).

Almost surely, 28213072136205 is an apocalyptic number.

8213072136205 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8213072136205 is a deficient number, since it is larger than the sum of its proper divisors (2329942488035).

8213072136205 is a wasteful number, since it uses less digits than its factorization.

8213072136205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996127728.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 8213072136205 in words is "eight trillion, two hundred thirteen billion, seventy-two million, one hundred thirty-six thousand, two hundred five".

Divisors: 1 5 17 85 97 485 1649 8245 996127609 4980638045 16934169353 84670846765 96624378073 483121890365 1642614427241 8213072136205