841686386640 has 1280 divisors, whose sum is σ = 3218502574080. Its totient is φ = 181098086400.

The previous prime is 841686386599. The next prime is 841686386641. The reversal of 841686386640 is 46683686148.

841686386640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (841686386641) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 11854737805 + ... + 11854737875.

It is an arithmetic number, because the mean of its divisors is an integer number (2514455136).

Almost surely, 2^841686386640 is an apocalyptic number.

841686386640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 841686386640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609251287040).

841686386640 is an abundant number, since it is smaller than the sum of its proper divisors (2376816187440).

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

841686386640 is a wasteful number, since it uses less digits than its factorization.

841686386640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 60.

The spelling of 841686386640 in words is "eight hundred forty-one billion, six hundred eighty-six million, three hundred eighty-six thousand, six hundred forty".