2621021045016 has 128 divisors (see below), whose sum is σ = 7221076128000. Its totient is φ = 786160320000.

The previous prime is 2621021044991. The next prime is 2621021045087. The reversal of 2621021045016 is 6105401201262.

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 31 ways as a sum of consecutive naturals, for example, 109283746 + ... + 109307726.

It is an arithmetic number, because the mean of its divisors is an integer number (56414657250).

Almost surely, 2^{2621021045016} 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 2621021045016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3610538064000).

2621021045016 is an abundant number, since it is smaller than the sum of its proper divisors (4600055082984).

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

2621021045016 is a wasteful number, since it uses less digits than its factorization.

2621021045016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28201 (or 28197 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 2621021045016 its reverse (6105401201262), we get a palindrome (8726422246278).

The spelling of 2621021045016 in words is "two trillion, six hundred twenty-one billion, twenty-one million, forty-five thousand, sixteen".