30149887991 has 16 divisors (see below), whose sum is σ = 32249337120. Its totient is φ = 28087879680.

The previous prime is 30149887987. The next prime is 30149888033. The reversal of 30149887991 is 19978894103.

It is a cyclic number.

It is not a de Polignac number, because 30149887991 - 2² = 30149887987 is a prime.

It is a Smith number, since the sum of its digits (59) 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 30149887991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30149887931) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 777401 + ... + 815261.

It is an arithmetic number, because the mean of its divisors is an integer number (2015583570).

Almost surely, 2^30149887991 is an apocalyptic number.

30149887991 is a deficient number, since it is larger than the sum of its proper divisors (2099449129).

30149887991 is a wasteful number, since it uses less digits than its factorization.

30149887991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38354.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 30149887991 in words is "thirty billion, one hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred ninety-one".