8618816774646 has 480 divisors, whose sum is σ = 22541968096032. Its totient is φ = 2445700055040.

The previous prime is 8618816774627. The next prime is 8618816774699. The reversal of 8618816774646 is 6464776188168.

8618816774646 is a `hidden beast` number, since 8 + 6 + 1 + 88 + 16 + 77 + 464 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 9827612760 + ... + 9827613636.

Almost surely, 2^{8618816774646} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8618816774646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11270984048016).

8618816774646 is an abundant number, since it is smaller than the sum of its proper divisors (13923151321386).

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

8618816774646 is a wasteful number, since it uses less digits than its factorization.

8618816774646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1220 counting only the distinct ones).

The product of its digits is 520224768, while the sum is 72.

The spelling of 8618816774646 in words is "eight trillion, six hundred eighteen billion, eight hundred sixteen million, seven hundred seventy-four thousand, six hundred forty-six".