82517782389 has 32 divisors (see below), whose sum is σ = 127399403520. Its totient is φ = 46531884672.

The previous prime is 82517782381. The next prime is 82517782397. The reversal of 82517782389 is 98328771528.

It is an interprime number because it is at equal distance from previous prime (82517782381) and next prime (82517782397).

It is not a de Polignac number, because 82517782389 - 2³ = 82517782381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82517782381) 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, 3450417 + ... + 3474249.

It is an arithmetic number, because the mean of its divisors is an integer number (3981231360).

Almost surely, 2^82517782389 is an apocalyptic number.

It is an amenable number.

82517782389 is a deficient number, since it is larger than the sum of its proper divisors (44881621131).

82517782389 is a wasteful number, since it uses less digits than its factorization.

82517782389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26009.

The product of its digits is 13547520, while the sum is 60.

The spelling of 82517782389 in words is "eighty-two billion, five hundred seventeen million, seven hundred eighty-two thousand, three hundred eighty-nine".