506505878 has 4 divisors (see below), whose sum is σ = 759758820. Its totient is φ = 253252938.

The previous prime is 506505847. The next prime is 506505917. The reversal of 506505878 is 878505605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878505605 = 5 ⋅175701121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126626468 + ... + 126626471.

It is an arithmetic number, because the mean of its divisors is an integer number (189939705).

Almost surely, 2^506505878 is an apocalyptic number.

506505878 is a deficient number, since it is larger than the sum of its proper divisors (253252942).

506505878 is a wasteful number, since it uses less digits than its factorization.

506505878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253252941.

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

The square root of 506505878 is about 22505.6854594567. The cubic root of 506505878 is about 797.1281812824.

The spelling of 506505878 in words is "five hundred six million, five hundred five thousand, eight hundred seventy-eight".