30991677444 has 288 divisors, whose sum is σ = 97985888000. Its totient is φ = 8042001408.

The previous prime is 30991677439. The next prime is 30991677463. The reversal of 30991677444 is 44477619903.

30991677444 is a `hidden beast` number, since 30 + 9 + 9 + 167 + 7 + 444 = 666.

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 95 ways as a sum of consecutive naturals, for example, 81772047 + ... + 81772425.

Almost surely, 2^30991677444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30991677444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48992944000).

30991677444 is an abundant number, since it is smaller than the sum of its proper divisors (66994210556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30991677444 is a wasteful number, since it uses less digits than its factorization.

30991677444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 30991677444 in words is "thirty billion, nine hundred ninety-one million, six hundred seventy-seven thousand, four hundred forty-four".