82518840840 has 128 divisors (see below), whose sum is σ = 253295890560. Its totient is φ = 21500504064.

The previous prime is 82518840829. The next prime is 82518840841. The reversal of 82518840840 is 4804881528.

It is a self number, because there is not a number n which added to its sum of digits gives 82518840840.

It is not an unprimeable number, because it can be changed into a prime (82518840841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 893302 + ... + 981338.

It is an arithmetic number, because the mean of its divisors is an integer number (1978874145).

Almost surely, 2^82518840840 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 82518840840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126647945280).

82518840840 is an abundant number, since it is smaller than the sum of its proper divisors (170777049720).

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

82518840840 is a wasteful number, since it uses less digits than its factorization.

82518840840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88231 (or 88227 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 48.

The spelling of 82518840840 in words is "eighty-two billion, five hundred eighteen million, eight hundred forty thousand, eight hundred forty".