506556641028779 has 6 divisors (see below), whose sum is σ = 556793663279700. Its totient is φ = 460506037298780.

The previous prime is 506556641028679. The next prime is 506556641028797. The reversal of 506556641028779 is 977820146655605.

It is a de Polignac number, because none of the positive numbers 2^k-506556641028779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (506556641028679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2093209260329 + ... + 2093209260570.

It is an arithmetic number, because the mean of its divisors is an integer number (92798943879950).

Almost surely, 2^{506556641028779} is an apocalyptic number.

506556641028779 is a deficient number, since it is larger than the sum of its proper divisors (50237022250921).

506556641028779 is a wasteful number, since it uses less digits than its factorization.

506556641028779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186418520921 (or 4186418520910 counting only the distinct ones).

The product of its (nonzero) digits is 762048000, while the sum is 71.

The spelling of 506556641028779 in words is "five hundred six trillion, five hundred fifty-six billion, six hundred forty-one million, twenty-eight thousand, seven hundred seventy-nine".