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68148148220 = 2253407407411
BaseRepresentation
bin111111011101111100…
…100011011111111100
320111220100202121210122
4333131330203133330
52104031411220340
651150135154112
74631526462605
oct773574433774
9214810677718
1068148148220
11269a0942459
121125a815938
1365708a1379
143426ac2dac
151b8cc63db5
hexfddf237fc

68148148220 has 12 divisors (see below), whose sum is σ = 143111111304. Its totient is φ = 27259259280.

The previous prime is 68148148219. The next prime is 68148148223. The reversal of 68148148220 is 2284184186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68148148223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703703686 + ... + 1703703725.

It is an arithmetic number, because the mean of its divisors is an integer number (11925925942).

Almost surely, 268148148220 is an apocalyptic number.

It is an amenable number.

68148148220 is an abundant number, since it is smaller than the sum of its proper divisors (74962963084).

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

68148148220 is a wasteful number, since it uses less digits than its factorization.

68148148220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407407420 (or 3407407418 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 68148148220 in words is "sixty-eight billion, one hundred forty-eight million, one hundred forty-eight thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 3407407411 6814814822 13629629644 17037037055 34074074110 68148148220