505157638169 has 4 divisors (see below), whose sum is σ = 505209178896. Its totient is φ = 505106097444.

The previous prime is 505157638093. The next prime is 505157638171. The reversal of 505157638169 is 961836751505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505157638169 - 2⁸ = 505157637913 is a prime.

It is a super-2 number, since 2×505157638169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505157634169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25755659 + ... + 25775264.

It is an arithmetic number, because the mean of its divisors is an integer number (126302294724).

Almost surely, 2^505157638169 is an apocalyptic number.

It is an amenable number.

505157638169 is a deficient number, since it is larger than the sum of its proper divisors (51540727).

505157638169 is an equidigital number, since it uses as much as digits as its factorization.

505157638169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51540726.

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 505157638169 in words is "five hundred five billion, one hundred fifty-seven million, six hundred thirty-eight thousand, one hundred sixty-nine".