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80513031508 = 22721331598521
BaseRepresentation
bin100101011111011110…
…0110101110101010100
321200211002110202220221
41022332330311311110
52304342314002013
6100553121404124
75550121322200
oct1127674656524
9250732422827
1080513031508
1131166564268
121372b799644
137791500560
143c7ad63b00
15216355d08d
hex12bef35d54

80513031508 has 36 divisors (see below), whose sum is σ = 176509343892. Its totient is φ = 31851308160.

The previous prime is 80513031493. The next prime is 80513031517.

80513031508 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 27397532484 + 53115499024 = 165522^2 + 230468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15796713 + ... + 15801808.

Almost surely, 280513031508 is an apocalyptic number.

It is an amenable number.

80513031508 is an abundant number, since it is smaller than the sum of its proper divisors (95996312384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80513031508 is a wasteful number, since it uses less digits than its factorization.

80513031508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31598552 (or 31598543 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

It can be divided in two parts, 805130 and 31508, that added together give a palindrome (836638).

The spelling of 80513031508 in words is "eighty billion, five hundred thirteen million, thirty-one thousand, five hundred eight".

Divisors: 1 2 4 7 13 14 26 28 49 52 91 98 182 196 364 637 1274 2548 31598521 63197042 126394084 221189647 410780773 442379294 821561546 884758588 1548327529 1643123092 2875465411 3096655058 5750930822 6193310116 11501861644 20128257877 40256515754 80513031508