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505555005005 = 5101111001001
BaseRepresentation
bin1110101101101010110…
…11010010111001001101
31210022220222221012112122
413112311123102321031
531240334040130010
61024125422142325
751345060432251
oct7266533227115
91708828835478
10505555005005
1118544a690a26
1281b914219a5
133889ac7cc9b
141a67ccb8261
15d23d66a855
hex75b56d2e4d

505555005005 has 4 divisors (see below), whose sum is σ = 606666006012. Its totient is φ = 404444004000.

The previous prime is 505555004837. The next prime is 505555005047. The reversal of 505555005005 is 500500555505.

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 290498362441 + 215056642564 = 538979^2 + 463742^2 .

It is not a de Polignac number, because 505555005005 - 216 = 505554939469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50555500496 + ... + 50555500505.

It is an arithmetic number, because the mean of its divisors is an integer number (151666501503).

Almost surely, 2505555005005 is an apocalyptic number.

It is an amenable number.

505555005005 is a deficient number, since it is larger than the sum of its proper divisors (101111001007).

505555005005 is a wasteful number, since it uses less digits than its factorization.

505555005005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101111001006.

The product of its (nonzero) digits is 78125, while the sum is 35.

The spelling of 505555005005 in words is "five hundred five billion, five hundred fifty-five million, five thousand, five".

Divisors: 1 5 101111001001 505555005005