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6990823005 = 35479916061
BaseRepresentation
bin1101000001010111…
…10111111001011101
3200001012110121022120
412200223313321131
5103304122314010
63113405333153
7335145005115
oct64053677135
920035417276
106990823005
112a68156881
1214312671b9
13875441b7a
144a464c045
152adb04e70
hex1a0af7e5d

6990823005 has 16 divisors (see below), whose sum is σ = 11423303424. Its totient is φ = 3649110080.

The previous prime is 6990823003. The next prime is 6990823057. The reversal of 6990823005 is 5003280996.

It is not a de Polignac number, because 6990823005 - 21 = 6990823003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990823001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4957326 + ... + 4958735.

It is an arithmetic number, because the mean of its divisors is an integer number (713956464).

Almost surely, 26990823005 is an apocalyptic number.

It is an amenable number.

6990823005 is a deficient number, since it is larger than the sum of its proper divisors (4432480419).

6990823005 is a wasteful number, since it uses less digits than its factorization.

6990823005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9916116.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 6990823005 is about 83611.1416319619. The cubic root of 6990823005 is about 1912.0948667245.

The spelling of 6990823005 in words is "six billion, nine hundred ninety million, eight hundred twenty-three thousand, five".

Divisors: 1 3 5 15 47 141 235 705 9916061 29748183 49580305 148740915 466054867 1398164601 2330274335 6990823005