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641880458930 = 25263244061011
BaseRepresentation
bin10010101011100110000…
…11101000011010110010
32021100210202022210200202
421111303003220122302
541004032344141210
61210513101515202
764242252610244
oct11256303503262
92240722283622
10641880458930
11228246870227
12a4498572b02
13486b5491059
14230d24b0094
1511a6b9a29a5
hex95730e86b2

641880458930 has 16 divisors (see below), whose sum is σ = 1159777929024. Its totient is φ = 255775938480.

The previous prime is 641880458917. The next prime is 641880458953. The reversal of 641880458930 is 39854088146.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122027876 + ... + 122033135.

It is an arithmetic number, because the mean of its divisors is an integer number (72486120564).

Almost surely, 2641880458930 is an apocalyptic number.

641880458930 is a deficient number, since it is larger than the sum of its proper divisors (517897470094).

641880458930 is a wasteful number, since it uses less digits than its factorization.

641880458930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244061281.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 641880458930 in words is "six hundred forty-one billion, eight hundred eighty million, four hundred fifty-eight thousand, nine hundred thirty".

Divisors: 1 2 5 10 263 526 1315 2630 244061011 488122022 1220305055 2440610110 64188045893 128376091786 320940229465 641880458930