82198126191 has 4 divisors (see below), whose sum is σ = 109597501592. Its totient is φ = 54798750792.

The previous prime is 82198126189. The next prime is 82198126207. The reversal of 82198126191 is 19162189128.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 82198126191 - 2¹ = 82198126189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82198126191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82198126151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13699687696 + ... + 13699687701.

It is an arithmetic number, because the mean of its divisors is an integer number (27399375398).

Almost surely, 2^82198126191 is an apocalyptic number.

82198126191 is a deficient number, since it is larger than the sum of its proper divisors (27399375401).

82198126191 is a wasteful number, since it uses less digits than its factorization.

82198126191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27399375400.

The product of its digits is 124416, while the sum is 48.

The spelling of 82198126191 in words is "eighty-two billion, one hundred ninety-eight million, one hundred twenty-six thousand, one hundred ninety-one".