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11691110638 = 213742668287
BaseRepresentation
bin10101110001101100…
…00011000011101110
31010011202212221210201
422320312003003232
5142420411020023
65212033024114
7562500541444
oct127066030356
933152787721
1011691110638
114a5a366509
1223233b503a
13114417385c
147cc9b2b94
154865a7bad
hex2b8d830ee

11691110638 has 8 divisors (see below), whose sum is σ = 17664671232. Its totient is φ = 5802886896.

The previous prime is 11691110633. The next prime is 11691110713. The reversal of 11691110638 is 83601119611.

11691110638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 11691110597 and 11691110606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691110633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21333870 + ... + 21334417.

It is an arithmetic number, because the mean of its divisors is an integer number (2208083904).

Almost surely, 211691110638 is an apocalyptic number.

11691110638 is a deficient number, since it is larger than the sum of its proper divisors (5973560594).

11691110638 is a wasteful number, since it uses less digits than its factorization.

11691110638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42668426.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 11691110638 in words is "eleven billion, six hundred ninety-one million, one hundred ten thousand, six hundred thirty-eight".

Divisors: 1 2 137 274 42668287 85336574 5845555319 11691110638