30307844991 has 4 divisors (see below), whose sum is σ = 40410459992. Its totient is φ = 20205229992.

The previous prime is 30307844939. The next prime is 30307845017. The reversal of 30307844991 is 19944870303.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-30307844991 is a prime.

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 30307844991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30307844491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5051307496 + ... + 5051307501.

It is an arithmetic number, because the mean of its divisors is an integer number (10102614998).

Almost surely, 2^30307844991 is an apocalyptic number.

30307844991 is a deficient number, since it is larger than the sum of its proper divisors (10102615001).

30307844991 is a wasteful number, since it uses less digits than its factorization.

30307844991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102615000.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 30307844991 in words is "thirty billion, three hundred seven million, eight hundred forty-four thousand, nine hundred ninety-one".