501005055505 has 4 divisors (see below), whose sum is σ = 601206066612. Its totient is φ = 400804044400.

The previous prime is 501005055503. The next prime is 501005055521. The reversal of 501005055505 is 505550500105.

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 262672650256 + 238332405249 = 512516^2 + 488193^2 .

It is not a de Polignac number, because 501005055505 - 2¹ = 501005055503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501005055503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50100505546 + ... + 50100505555.

It is an arithmetic number, because the mean of its divisors is an integer number (150301516653).

Almost surely, 2^501005055505 is an apocalyptic number.

It is an amenable number.

501005055505 is a deficient number, since it is larger than the sum of its proper divisors (100201011107).

501005055505 is a wasteful number, since it uses less digits than its factorization.

501005055505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100201011106.

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 501005055505 in words is "five hundred one billion, five million, fifty-five thousand, five hundred five".