8345544987780 has 1728 divisors, whose sum is σ = 35381441571840. Its totient is φ = 1548242657280.

The previous prime is 8345544987779. The next prime is 8345544987797. The reversal of 8345544987780 is 877894455438.

It is a happy number.

8345544987780 is a `hidden beast` number, since 8 + 3 + 4 + 5 + 54 + 498 + 7 + 7 + 80 = 666.

It is a super-2 number, since 2×8345544987780² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8345544987699 and 8345544987708.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 23246643241 + ... + 23246643599.

It is an arithmetic number, because the mean of its divisors is an integer number (20475371280).

Almost surely, 2^{8345544987780} 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 8345544987780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17690720785920).

8345544987780 is an abundant number, since it is smaller than the sum of its proper divisors (27035896584060).

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

8345544987780 is a wasteful number, since it uses less digits than its factorization.

8345544987780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 1083801600, while the sum is 72.

The spelling of 8345544987780 in words is "eight trillion, three hundred forty-five billion, five hundred forty-four million, nine hundred eighty-seven thousand, seven hundred eighty".