30557561840 has 40 divisors (see below), whose sum is σ = 76511436288. Its totient is φ = 11282791680.

The previous prime is 30557561791. The next prime is 30557561849. The reversal of 30557561840 is 4816575503.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 30557561791 and 30557561800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30557561849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14690096 + ... + 14692175.

Almost surely, 2^30557561840 is an apocalyptic number.

It is an amenable number.

30557561840 is an abundant number, since it is smaller than the sum of its proper divisors (45953874448).

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

30557561840 is a wasteful number, since it uses less digits than its factorization.

30557561840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29382297 (or 29382291 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 30557561840 in words is "thirty billion, five hundred fifty-seven million, five hundred sixty-one thousand, eight hundred forty".