86782757391 has 18 divisors (see below), whose sum is σ = 137784563280. Its totient is φ = 52595609880.

The previous prime is 86782757371. The next prime is 86782757417. The reversal of 86782757391 is 19375728768.

It is not a de Polignac number, because 86782757391 - 2⁵ = 86782757359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86782757371) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39844071 + ... + 39846248.

It is an arithmetic number, because the mean of its divisors is an integer number (7654697960).

Almost surely, 2^86782757391 is an apocalyptic number.

86782757391 is a deficient number, since it is larger than the sum of its proper divisors (51001805889).

86782757391 is a wasteful number, since it uses less digits than its factorization.

86782757391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79690347 (or 79690333 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 86782757391 in words is "eighty-six billion, seven hundred eighty-two million, seven hundred fifty-seven thousand, three hundred ninety-one".