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7661483189 = 31247144619
BaseRepresentation
bin1110010001010100…
…01111010010110101
3201202221102200010122
413020222033102311
5111142314430224
63304124101325
7360600350453
oct71052172265
921687380118
107661483189
113281786798
121599994845
1395137a909
145297499d3
152ec92e15e
hex1c8a8f4b5

7661483189 has 4 divisors (see below), whose sum is σ = 7908627840. Its totient is φ = 7414338540.

The previous prime is 7661483171. The next prime is 7661483197. The reversal of 7661483189 is 9813841667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7661483189 - 216 = 7661417653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7661483189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661483119) 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, 123572279 + ... + 123572340.

It is an arithmetic number, because the mean of its divisors is an integer number (1977156960).

Almost surely, 27661483189 is an apocalyptic number.

It is an amenable number.

7661483189 is a deficient number, since it is larger than the sum of its proper divisors (247144651).

7661483189 is a wasteful number, since it uses less digits than its factorization.

7661483189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247144650.

The product of its digits is 1741824, while the sum is 53.

The square root of 7661483189 is about 87529.8988289145. The cubic root of 7661483189 is about 1971.3827451133.

The spelling of 7661483189 in words is "seven billion, six hundred sixty-one million, four hundred eighty-three thousand, one hundred eighty-nine".

Divisors: 1 31 247144619 7661483189