30621112042556 has 96 divisors (see below), whose sum is σ = 65283309020160. Its totient is φ = 12275748301824.

The previous prime is 30621112042519. The next prime is 30621112042579. The reversal of 30621112042556 is 65524021112603.

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

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 14842130 + ... + 16778886.

It is an arithmetic number, because the mean of its divisors is an integer number (680034468960).

Almost surely, 2^{30621112042556} 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 30621112042556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32641654510080).

30621112042556 is an abundant number, since it is smaller than the sum of its proper divisors (34662196977604).

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

30621112042556 is a wasteful number, since it uses less digits than its factorization.

30621112042556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937163 (or 1937161 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 30621112042556 in words is "thirty trillion, six hundred twenty-one billion, one hundred twelve million, forty-two thousand, five hundred fifty-six".