30128557605 has 32 divisors (see below), whose sum is σ = 49792803840. Its totient is φ = 15540195840.

The previous prime is 30128557489. The next prime is 30128557609. The reversal of 30128557605 is 50675582103.

It is not a de Polignac number, because 30128557605 - 2¹¹ = 30128555557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30128557609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 729961 + ... + 770129.

It is an arithmetic number, because the mean of its divisors is an integer number (1556025120).

Almost surely, 2^30128557605 is an apocalyptic number.

It is an amenable number.

30128557605 is a deficient number, since it is larger than the sum of its proper divisors (19664246235).

30128557605 is a wasteful number, since it uses less digits than its factorization.

30128557605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41821.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 30128557605 in words is "thirty billion, one hundred twenty-eight million, five hundred fifty-seven thousand, six hundred five".