30421564544 has 128 divisors (see below), whose sum is σ = 74398800000. Its totient is φ = 12351273984.

The previous prime is 30421564531. The next prime is 30421564571. The reversal of 30421564544 is 44546512403.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 30421564498 and 30421564507.

It is a congruent number.

It is an unprimeable number.

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, 815942 + ... + 852410.

It is an arithmetic number, because the mean of its divisors is an integer number (581240625).

Almost surely, 2^30421564544 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 30421564544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37199400000).

30421564544 is an abundant number, since it is smaller than the sum of its proper divisors (43977235456).

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

30421564544 is an equidigital number, since it uses as much as digits as its factorization.

30421564544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36523 (or 36497 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 30421564544 in words is "thirty billion, four hundred twenty-one million, five hundred sixty-four thousand, five hundred forty-four".