5813778550566 has 64 divisors (see below), whose sum is σ = 13369141933056. Its totient is φ = 1651046707200.

The previous prime is 5813778550549. The next prime is 5813778550579. The reversal of 5813778550566 is 6650558773185.

It is a junction number, because it is equal to n+sod(n) for n = 5813778550497 and 5813778550506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3980446 + ... + 5241326.

It is an arithmetic number, because the mean of its divisors is an integer number (208892842704).

Almost surely, 2^{5813778550566} is an apocalyptic number.

5813778550566 is an abundant number, since it is smaller than the sum of its proper divisors (7555363382490).

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

5813778550566 is a wasteful number, since it uses less digits than its factorization.

5813778550566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261557.

The product of its (nonzero) digits is 211680000, while the sum is 66.

The spelling of 5813778550566 in words is "five trillion, eight hundred thirteen billion, seven hundred seventy-eight million, five hundred fifty thousand, five hundred sixty-six".