83405212187 has 16 divisors (see below), whose sum is σ = 91198908288. Its totient is φ = 75646908480.

The previous prime is 83405212181. The next prime is 83405212213. The reversal of 83405212187 is 78121250438.

It is not a de Polignac number, because 83405212187 - 2²⁰ = 83404163611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83405212181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21258608 + ... + 21262530.

It is an arithmetic number, because the mean of its divisors is an integer number (5699931768).

Almost surely, 2^83405212187 is an apocalyptic number.

83405212187 is a deficient number, since it is larger than the sum of its proper divisors (7793696101).

83405212187 is a wasteful number, since it uses less digits than its factorization.

83405212187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7930.

The product of its (nonzero) digits is 107520, while the sum is 41.

It can be divided in two parts, 83405 and 212187, that added together give a palindrome (295592).

The spelling of 83405212187 in words is "eighty-three billion, four hundred five million, two hundred twelve thousand, one hundred eighty-seven".