82787804790 has 128 divisors (see below), whose sum is σ = 211602129408. Its totient is φ = 20657694720.

The previous prime is 82787804789. The next prime is 82787804797. The reversal of 82787804790 is 9740878728.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82787804797) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119808345 + ... + 119809035.

It is an arithmetic number, because the mean of its divisors is an integer number (1653141636).

Almost surely, 2^82787804790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82787804790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105801064704).

82787804790 is an abundant number, since it is smaller than the sum of its proper divisors (128814324618).

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

82787804790 is a wasteful number, since it uses less digits than its factorization.

82787804790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742.

The product of its (nonzero) digits is 12644352, while the sum is 60.

The spelling of 82787804790 in words is "eighty-two billion, seven hundred eighty-seven million, eight hundred four thousand, seven hundred ninety".