1808635640616 has 256 divisors, whose sum is σ = 5791109068800. Its totient is φ = 512313984000.

The previous prime is 1808635640599. The next prime is 1808635640621. The reversal of 1808635640616 is 6160465368081.

1808635640616 is a `hidden beast` number, since 1 + 8 + 0 + 8 + 63 + 564 + 0 + 6 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 237880671 + ... + 237888273.

It is an arithmetic number, because the mean of its divisors is an integer number (22621519800).

Almost surely, 2^{1808635640616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1808635640616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895554534400).

1808635640616 is an abundant number, since it is smaller than the sum of its proper divisors (3982473428184).

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

1808635640616 is a wasteful number, since it uses less digits than its factorization.

1808635640616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957 (or 8947 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 1808635640616 in words is "one trillion, eight hundred eight billion, six hundred thirty-five million, six hundred forty thousand, six hundred sixteen".