53561784996 has 72 divisors (see below), whose sum is σ = 140120198400. Its totient is φ = 17233439040.

The previous prime is 53561784919. The next prime is 53561785019. The reversal of 53561784996 is 69948716535.

53561784996 is a `hidden beast` number, since 5 + 3 + 5 + 617 + 8 + 4 + 9 + 9 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 372435 + ... + 495813.

Almost surely, 2^53561784996 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 53561784996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70060099200).

53561784996 is an abundant number, since it is smaller than the sum of its proper divisors (86558413404).

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

53561784996 is a wasteful number, since it uses less digits than its factorization.

53561784996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123809 (or 123804 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 53561784996 in words is "fifty-three billion, five hundred sixty-one million, seven hundred eighty-four thousand, nine hundred ninety-six".