8209142174091 has 16 divisors (see below), whose sum is σ = 11644303160448. Its totient is φ = 5126422761600.

The previous prime is 8209142174069. The next prime is 8209142174119. The reversal of 8209142174091 is 1904712419028.

It is not a de Polignac number, because 8209142174091 - 2¹⁵ = 8209142141323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8209142174091.

It is not an unprimeable number, because it can be changed into a prime (8209142174041) 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, 381419505 + ... + 381441026.

It is an arithmetic number, because the mean of its divisors is an integer number (727768947528).

Almost surely, 2^{8209142174091} is an apocalyptic number.

8209142174091 is a deficient number, since it is larger than the sum of its proper divisors (3435160986357).

8209142174091 is a wasteful number, since it uses less digits than its factorization.

8209142174091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762860762.

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 8209142174091 in words is "eight trillion, two hundred nine billion, one hundred forty-two million, one hundred seventy-four thousand, ninety-one".