30561543936 has 432 divisors, whose sum is σ = 113423751168. Its totient is φ = 7680614400.

The previous prime is 30561543923. The next prime is 30561543941. The reversal of 30561543936 is 63934516503.

30561543936 is a `hidden beast` number, since 3 + 0 + 561 + 54 + 3 + 9 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 30561543891 and 30561543900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5496870 + ... + 5502426.

Almost surely, 2^30561543936 is an apocalyptic number.

30561543936 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30561543936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56711875584).

30561543936 is an abundant number, since it is smaller than the sum of its proper divisors (82862207232).

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

30561543936 is a wasteful number, since it uses less digits than its factorization.

30561543936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5611 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 45.

The spelling of 30561543936 in words is "thirty billion, five hundred sixty-one million, five hundred forty-three thousand, nine hundred thirty-six".