505556350405 has 8 divisors (see below), whose sum is σ = 606674069784. Its totient is φ = 404440780800.

The previous prime is 505556350379. The next prime is 505556350423. The reversal of 505556350405 is 504053655505.

It can be written as a sum of positive squares in 4 ways, for example, as 2643876 + 505553706529 = 1626^2 + 711023^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-505556350405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35445 + ... + 1006165.

It is an arithmetic number, because the mean of its divisors is an integer number (75834258723).

Almost surely, 2^505556350405 is an apocalyptic number.

It is an amenable number.

505556350405 is a deficient number, since it is larger than the sum of its proper divisors (101117719379).

505556350405 is a wasteful number, since it uses less digits than its factorization.

505556350405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074887.

The product of its (nonzero) digits is 1125000, while the sum is 43.

The spelling of 505556350405 in words is "five hundred five billion, five hundred fifty-six million, three hundred fifty thousand, four hundred five".