505772545 has 8 divisors (see below), whose sum is σ = 608668200. Its totient is φ = 403457280.

The previous prime is 505772513. The next prime is 505772551. The reversal of 505772545 is 545277505.

It can be written as a sum of positive squares in 4 ways, for example, as 184932801 + 320839744 = 13599^2 + 17912^2 .

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

It is not a de Polignac number, because 505772545 - 2⁵ = 505772513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505772498 and 505772507.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 143176 + ... + 146665.

It is an arithmetic number, because the mean of its divisors is an integer number (76083525).

Almost surely, 2^505772545 is an apocalyptic number.

It is an amenable number.

505772545 is a deficient number, since it is larger than the sum of its proper divisors (102895655).

505772545 is a wasteful number, since it uses less digits than its factorization.

505772545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290195.

The product of its (nonzero) digits is 245000, while the sum is 40.

The square root of 505772545 is about 22489.3873860539. The cubic root of 505772545 is about 796.7432941783.

The spelling of 505772545 in words is "five hundred five million, seven hundred seventy-two thousand, five hundred forty-five".