30727891145 has 16 divisors (see below), whose sum is σ = 43500499968. Its totient is φ = 20390857920.

The previous prime is 30727891111. The next prime is 30727891157. The reversal of 30727891145 is 54119872703.

It is not a de Polignac number, because 30727891145 - 2¹² = 30727887049 is a prime.

It is a super-2 number, since 2×30727891145² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30727891145.

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 15 ways as a sum of consecutive naturals, for example, 14159234 + ... + 14161403.

It is an arithmetic number, because the mean of its divisors is an integer number (2718781248).

Almost surely, 2^30727891145 is an apocalyptic number.

30727891145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30727891145 is a deficient number, since it is larger than the sum of its proper divisors (12772608823).

30727891145 is a wasteful number, since it uses less digits than its factorization.

30727891145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28320680.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 30727891145 in words is "thirty billion, seven hundred twenty-seven million, eight hundred ninety-one thousand, one hundred forty-five".