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640661114 = 21916859503
BaseRepresentation
bin100110001011111…
…011011001111010
31122122111221211102
4212023323121322
52303002123424
6143323331402
721606346442
oct4613733172
91578457742
10640661114
112a97001a5
1215a680b62
13a2964322
146112d122
153b3a07ae
hex262fb67a

640661114 has 8 divisors (see below), whose sum is σ = 1011570240. Its totient is φ = 303471036.

The previous prime is 640661093. The next prime is 640661129. The reversal of 640661114 is 411166046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8429714 + ... + 8429789.

It is an arithmetic number, because the mean of its divisors is an integer number (126446280).

Almost surely, 2640661114 is an apocalyptic number.

640661114 is a deficient number, since it is larger than the sum of its proper divisors (370909126).

640661114 is a wasteful number, since it uses less digits than its factorization.

640661114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16859524.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 640661114 is about 25311.2843214247. The cubic root of 640661114 is about 862.0705086749.

The spelling of 640661114 in words is "six hundred forty million, six hundred sixty-one thousand, one hundred fourteen".

Divisors: 1 2 19 38 16859503 33719006 320330557 640661114