505755257507 has 4 divisors (see below), whose sum is σ = 505779176760. Its totient is φ = 505731338256.

The previous prime is 505755257489. The next prime is 505755257509. The reversal of 505755257507 is 705752557505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705752557505 = 5 ⋅141150511501.

It is a cyclic number.

It is not a de Polignac number, because 505755257507 - 2³⁶ = 437035780771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505755257509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11927882 + ... + 11970207.

It is an arithmetic number, because the mean of its divisors is an integer number (126444794190).

Almost surely, 2^505755257507 is an apocalyptic number.

505755257507 is a deficient number, since it is larger than the sum of its proper divisors (23919253).

505755257507 is a wasteful number, since it uses less digits than its factorization.

505755257507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23919252.

The product of its (nonzero) digits is 10718750, while the sum is 53.

The spelling of 505755257507 in words is "five hundred five billion, seven hundred fifty-five million, two hundred fifty-seven thousand, five hundred seven".