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87215730080 = 2551015397013
BaseRepresentation
bin101000100111001110…
…1100110110110100000
322100010012210010211012
41101032131212312200
52412104211330310
6104022155440052
76205200321353
oct1211635466640
9270105703735
1087215730080
1133a96007976
1214aa0456028
1382bc041a9b
14431521029a
152406becc05
hex144e766da0

87215730080 has 48 divisors (see below), whose sum is σ = 208087271784. Its totient is φ = 34540876800.

The previous prime is 87215730061. The next prime is 87215730103. The reversal of 87215730080 is 8003751278.

It can be written as a sum of positive squares in 4 ways, for example, as 84083760784 + 3131969296 = 289972^2 + 55964^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682347 + ... + 2714666.

Almost surely, 287215730080 is an apocalyptic number.

87215730080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87215730080 is an abundant number, since it is smaller than the sum of its proper divisors (120871541704).

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

87215730080 is a wasteful number, since it uses less digits than its factorization.

87215730080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397129 (or 5397121 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 87215730080 in words is "eighty-seven billion, two hundred fifteen million, seven hundred thirty thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 101 160 202 404 505 808 1010 1616 2020 3232 4040 8080 16160 5397013 10794026 21588052 26985065 43176104 53970130 86352208 107940260 172704416 215880520 431761040 545098313 863522080 1090196626 2180393252 2725491565 4360786504 5450983130 8721573008 10901966260 17443146016 21803932520 43607865040 87215730080