4777561417566 has 32 divisors (see below), whose sum is σ = 10920979261440. Its totient is φ = 1364912688096.

The previous prime is 4777561417501. The next prime is 4777561417579. The reversal of 4777561417566 is 6657141657774.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 4777561417497 and 4777561417506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3815086 + ... + 4910193.

It is an arithmetic number, because the mean of its divisors is an integer number (341280601920).

Almost surely, 2^{4777561417566} is an apocalyptic number.

4777561417566 is an abundant number, since it is smaller than the sum of its proper divisors (6143417843874).

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

4777561417566 is a wasteful number, since it uses less digits than its factorization.

4777561417566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8738328.

The product of its digits is 207446400, while the sum is 66.

The spelling of 4777561417566 in words is "four trillion, seven hundred seventy-seven billion, five hundred sixty-one million, four hundred seventeen thousand, five hundred sixty-six".