505106172845 has 8 divisors (see below), whose sum is σ = 622509229464. Its totient is φ = 393163723584.

The previous prime is 505106172833. The next prime is 505106172871. The reversal of 505106172845 is 548271601505.

It can be written as a sum of positive squares in 4 ways, for example, as 109853799364 + 395252373481 = 331442^2 + 628691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505106172845 - 2⁴ = 505106172829 is a prime.

It is a super-2 number, since 2×505106172845² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505106172796 and 505106172805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365151634 + ... + 1365152003.

It is an arithmetic number, because the mean of its divisors is an integer number (77813653683).

Almost surely, 2^505106172845 is an apocalyptic number.

It is an amenable number.

505106172845 is a deficient number, since it is larger than the sum of its proper divisors (117403056619).

505106172845 is a wasteful number, since it uses less digits than its factorization.

505106172845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730303679.

The product of its (nonzero) digits is 336000, while the sum is 44.

The spelling of 505106172845 in words is "five hundred five billion, one hundred six million, one hundred seventy-two thousand, eight hundred forty-five".