8485641780 has 384 divisors, whose sum is σ = 30841896960. Its totient is φ = 1691712000.

The previous prime is 8485641763. The next prime is 8485641803. The reversal of 8485641780 is 871465848.

It is a super-2 number, since 2×8485641780² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25636215 + ... + 25636545.

It is an arithmetic number, because the mean of its divisors is an integer number (80317440).

Almost surely, 2^8485641780 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 8485641780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15420948480).

8485641780 is an abundant number, since it is smaller than the sum of its proper divisors (22356255180).

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

8485641780 is a wasteful number, since it uses less digits than its factorization.

8485641780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 51.

The square root of 8485641780 is about 92117.5432803112. The cubic root of 8485641780 is about 2039.6777797497.

The spelling of 8485641780 in words is "eight billion, four hundred eighty-five million, six hundred forty-one thousand, seven hundred eighty".