1643060145 has 32 divisors (see below), whose sum is σ = 2651126400. Its totient is φ = 868921344.
The previous prime is 1643060113. The next prime is 1643060191. The reversal of 1643060145 is 5410603461.
It is not a de Polignac number, because 1643060145 - 25 = 1643060113 is a prime.
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, 1125426 + ... + 1126884.
It is an arithmetic number, because the mean of its divisors is an integer number (82847700).
Almost surely, 21643060145 is an apocalyptic number.
1643060145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1643060145 is a deficient number, since it is larger than the sum of its proper divisors (1008066255).
1643060145 is a wasteful number, since it uses less digits than its factorization.
1643060145 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2049.
The product of its (nonzero) digits is 8640, while the sum is 30.
The square root of 1643060145 is about 40534.6783014248. The cubic root of 1643060145 is about 1180.0067377285.
The spelling of 1643060145 in words is "one billion, six hundred forty-three million, sixty thousand, one hundred forty-five".
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