505507761 has 12 divisors (see below), whose sum is σ = 796557840. Its totient is φ = 306368280.

The previous prime is 505507753. The next prime is 505507763. The reversal of 505507761 is 167705505.

It is not a de Polignac number, because 505507761 - 2³ = 505507753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505507763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2552971 + ... + 2553168.

It is an arithmetic number, because the mean of its divisors is an integer number (66379820).

Almost surely, 2^505507761 is an apocalyptic number.

It is an amenable number.

505507761 is a deficient number, since it is larger than the sum of its proper divisors (291050079).

505507761 is a wasteful number, since it uses less digits than its factorization.

505507761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106156 (or 5106153 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 505507761 is about 22483.4997498165. The cubic root of 505507761 is about 796.6042318638.

It can be divided in two parts, 50550 and 7761, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 505507761 in words is "five hundred five million, five hundred seven thousand, seven hundred sixty-one".