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8611608661 = 14821581041
BaseRepresentation
bin10000000010100101…
…01011100001010101
3211020011021001020221
420001102223201111
5120114032434121
63542304354341
7423255315535
oct100122534125
924204231227
108611608661
11371a035057
1218040159b1
13a73174836
145b99d34c5
1535605cb41
hex2014ab855

8611608661 has 4 divisors (see below), whose sum is σ = 8612204524. Its totient is φ = 8611012800.

The previous prime is 8611608631. The next prime is 8611608683. The reversal of 8611608661 is 1668061168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1917914436 + 6693694225 = 43794^2 + 81815^2 .

It is a cyclic number.

It is not a de Polignac number, because 8611608661 - 221 = 8609511509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8611608631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275700 + ... + 305341.

It is an arithmetic number, because the mean of its divisors is an integer number (2153051131).

Almost surely, 28611608661 is an apocalyptic number.

It is an amenable number.

8611608661 is a deficient number, since it is larger than the sum of its proper divisors (595863).

8611608661 is a wasteful number, since it uses less digits than its factorization.

8611608661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595862.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 8611608661 is about 92798.7535530516. The cubic root of 8611608661 is about 2049.7210535382.

The spelling of 8611608661 in words is "eight billion, six hundred eleven million, six hundred eight thousand, six hundred sixty-one".

Divisors: 1 14821 581041 8611608661