505775745 has 20 divisors (see below), whose sum is σ = 906650580. Its totient is φ = 269746848.

The previous prime is 505775741. The next prime is 505775759. The reversal of 505775745 is 547577505.

It is a happy number.

505775745 is a `hidden beast` number, since 5 + 0 + 5 + 77 + 574 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119771136 + 386004609 = 10944^2 + 19647^2 .

It is not a de Polignac number, because 505775745 - 2² = 505775741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 505775745.

It is not an unprimeable number, because it can be changed into a prime (505775741) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 624010 + ... + 624819.

It is an arithmetic number, because the mean of its divisors is an integer number (45332529).

Almost surely, 2^505775745 is an apocalyptic number.

It is an amenable number.

505775745 is a deficient number, since it is larger than the sum of its proper divisors (400874835).

505775745 is a wasteful number, since it uses less digits than its factorization.

505775745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248846 (or 1248837 counting only the distinct ones).

The product of its (nonzero) digits is 857500, while the sum is 45.

The square root of 505775745 is about 22489.4585306094. The cubic root of 505775745 is about 796.7449744943.

The spelling of 505775745 in words is "five hundred five million, seven hundred seventy-five thousand, seven hundred forty-five".