505654083667 has 4 divisors (see below), whose sum is σ = 505690457256. Its totient is φ = 505617710080.

The previous prime is 505654083659. The next prime is 505654083673. The reversal of 505654083667 is 766380456505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766380456505 = 5 ⋅153276091301.

It is a cyclic number.

It is not a de Polignac number, because 505654083667 - 2³ = 505654083659 is a prime.

It is a super-2 number, since 2×505654083667² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505654083617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18165934 + ... + 18193747.

It is an arithmetic number, because the mean of its divisors is an integer number (126422614314).

Almost surely, 2^505654083667 is an apocalyptic number.

505654083667 is a deficient number, since it is larger than the sum of its proper divisors (36373589).

505654083667 is a wasteful number, since it uses less digits than its factorization.

505654083667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36373588.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 505654083667 in words is "five hundred five billion, six hundred fifty-four million, eighty-three thousand, six hundred sixty-seven".