82858758840 has 640 divisors, whose sum is σ = 334875340800. Its totient is φ = 18106260480.

The previous prime is 82858758811. The next prime is 82858758847. The reversal of 82858758840 is 4885785828.

82858758840 is a `hidden beast` number, since 8 + 2 + 8 + 5 + 8 + 7 + 588 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82858758847) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 19920681 + ... + 19924839.

It is an arithmetic number, because the mean of its divisors is an integer number (523242720).

Almost surely, 2^82858758840 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 82858758840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167437670400).

82858758840 is an abundant number, since it is smaller than the sum of its proper divisors (252016581960).

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

82858758840 is a wasteful number, since it uses less digits than its factorization.

82858758840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249 (or 4236 counting only the distinct ones).

The product of its (nonzero) digits is 45875200, while the sum is 63.

The spelling of 82858758840 in words is "eighty-two billion, eight hundred fifty-eight million, seven hundred fifty-eight thousand, eight hundred forty".