506868806778 has 16 divisors (see below), whose sum is σ = 1013745429216. Its totient is φ = 168954966320.

The previous prime is 506868806777. The next prime is 506868806779. The reversal of 506868806778 is 877608868605.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (506868806777) and next prime (506868806779).

It is not an unprimeable number, because it can be changed into a prime (506868806777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836425 + ... + 1308947.

It is an arithmetic number, because the mean of its divisors is an integer number (63359089326).

Almost surely, 2^506868806778 is an apocalyptic number.

506868806778 is an abundant number, since it is smaller than the sum of its proper divisors (506876622438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

506868806778 is a wasteful number, since it uses less digits than its factorization.

506868806778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651309.

The product of its (nonzero) digits is 216760320, while the sum is 69.

The spelling of 506868806778 in words is "five hundred six billion, eight hundred sixty-eight million, eight hundred six thousand, seven hundred seventy-eight".