83916128391 has 16 divisors (see below), whose sum is σ = 112110303744. Its totient is φ = 55833097824.

The previous prime is 83916128389. The next prime is 83916128419. The reversal of 83916128391 is 19382161938.

It is not a de Polignac number, because 83916128391 - 2¹ = 83916128389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83916128321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5129661 + ... + 5145993.

It is an arithmetic number, because the mean of its divisors is an integer number (7006893984).

Almost surely, 2^83916128391 is an apocalyptic number.

83916128391 is a deficient number, since it is larger than the sum of its proper divisors (28194175353).

83916128391 is a wasteful number, since it uses less digits than its factorization.

83916128391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19630.

The product of its digits is 559872, while the sum is 51.

The spelling of 83916128391 in words is "eighty-three billion, nine hundred sixteen million, one hundred twenty-eight thousand, three hundred ninety-one".