30805557755 has 48 divisors (see below), whose sum is σ = 45023007744. Its totient is φ = 19816902720.

The previous prime is 30805557721. The next prime is 30805557779. The reversal of 30805557755 is 55775550803.

It is not a de Polignac number, because 30805557755 - 2¹⁶ = 30805492219 is a prime.

It is a Duffinian number.

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 47 ways as a sum of consecutive naturals, for example, 1289570 + ... + 1313240.

It is an arithmetic number, because the mean of its divisors is an integer number (937979328).

Almost surely, 2^30805557755 is an apocalyptic number.

30805557755 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30805557755 is a deficient number, since it is larger than the sum of its proper divisors (14217449989).

30805557755 is a wasteful number, since it uses less digits than its factorization.

30805557755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23824 (or 23805 counting only the distinct ones).

The product of its (nonzero) digits is 3675000, while the sum is 50.

The spelling of 30805557755 in words is "thirty billion, eight hundred five million, five hundred fifty-seven thousand, seven hundred fifty-five".