30561056505 has 24 divisors (see below), whose sum is σ = 60539998272. Its totient is φ = 13970768544.

The previous prime is 30561056497. The next prime is 30561056509. The reversal of 30561056505 is 50565016503.

30561056505 is a `hidden beast` number, since 30 + 5 + 61 + 0 + 565 + 0 + 5 = 666.

It is not a de Polignac number, because 30561056505 - 2³ = 30561056497 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30561056505.

It is not an unprimeable number, because it can be changed into a prime (30561056509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48509299 + ... + 48509928.

It is an arithmetic number, because the mean of its divisors is an integer number (2522499928).

Almost surely, 2^30561056505 is an apocalyptic number.

30561056505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30561056505 is a deficient number, since it is larger than the sum of its proper divisors (29978941767).

30561056505 is a wasteful number, since it uses less digits than its factorization.

30561056505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97019245 (or 97019242 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The spelling of 30561056505 in words is "thirty billion, five hundred sixty-one million, fifty-six thousand, five hundred five".