30489745664 has 144 divisors (see below), whose sum is σ = 73475095680. Its totient is φ = 12335431680.

The previous prime is 30489745567. The next prime is 30489745669. The reversal of 30489745664 is 46654798403.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (30489745669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10655594 + ... + 10658454.

It is an arithmetic number, because the mean of its divisors is an integer number (510243720).

Almost surely, 2^30489745664 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 30489745664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36737547840).

30489745664 is an abundant number, since it is smaller than the sum of its proper divisors (42985350016).

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

30489745664 is a wasteful number, since it uses less digits than its factorization.

30489745664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216 (or 3202 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 30489745664 in words is "thirty billion, four hundred eighty-nine million, seven hundred forty-five thousand, six hundred sixty-four".