82641705784 has 24 divisors (see below), whose sum is σ = 170320459680. Its totient is φ = 37564411280.

The previous prime is 82641705781. The next prime is 82641705799. The reversal of 82641705784 is 48750714628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82641705781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42685864 + ... + 42687799.

It is an arithmetic number, because the mean of its divisors is an integer number (7096685820).

Almost surely, 2^82641705784 is an apocalyptic number.

It is an amenable number.

82641705784 is an abundant number, since it is smaller than the sum of its proper divisors (87678753896).

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

82641705784 is a wasteful number, since it uses less digits than its factorization.

82641705784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85373691 (or 85373676 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 82641705784 in words is "eighty-two billion, six hundred forty-one million, seven hundred five thousand, seven hundred eighty-four".