505250647142761 has 4 divisors (see below), whose sum is σ = 544116081538372. Its totient is φ = 466385212747152.

The previous prime is 505250647142749. The next prime is 505250647142771. The reversal of 505250647142761 is 167241746052505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 221373303347161 + 283877343795600 = 14878619^2 + 16848660^2 .

It is a cyclic number.

It is not a de Polignac number, because 505250647142761 - 2¹⁵ = 505250647109993 is a prime.

It is a super-2 number, since 2×505250647142761² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505250647142771) 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, 19432717197786 + ... + 19432717197811.

It is an arithmetic number, because the mean of its divisors is an integer number (136029020384593).

Almost surely, 2^{505250647142761} is an apocalyptic number.

It is an amenable number.

505250647142761 is a deficient number, since it is larger than the sum of its proper divisors (38865434395611).

505250647142761 is a wasteful number, since it uses less digits than its factorization.

505250647142761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38865434395610.

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 505250647142761 in words is "five hundred five trillion, two hundred fifty billion, six hundred forty-seven million, one hundred forty-two thousand, seven hundred sixty-one".