30505913155 has 4 divisors (see below), whose sum is σ = 36607095792. Its totient is φ = 24404730520.

The previous prime is 30505913149. The next prime is 30505913231. The reversal of 30505913155 is 55131950503.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30505913155 - 2¹⁵ = 30505880387 is a prime.

It is a super-2 number, since 2×30505913155² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3050591311 + ... + 3050591320.

It is an arithmetic number, because the mean of its divisors is an integer number (9151773948).

Almost surely, 2^30505913155 is an apocalyptic number.

30505913155 is a deficient number, since it is larger than the sum of its proper divisors (6101182637).

30505913155 is an equidigital number, since it uses as much as digits as its factorization.

30505913155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6101182636.

The product of its (nonzero) digits is 50625, while the sum is 37.

The spelling of 30505913155 in words is "thirty billion, five hundred five million, nine hundred thirteen thousand, one hundred fifty-five".