82197819538 has 8 divisors (see below), whose sum is σ = 125386504560. Its totient is φ = 40402318020.

The previous prime is 82197819533. The next prime is 82197819553. The reversal of 82197819538 is 83591879128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×82197819538² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82197819533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348295728 + ... + 348295963.

It is an arithmetic number, because the mean of its divisors is an integer number (15673313070).

Almost surely, 2^82197819538 is an apocalyptic number.

82197819538 is a deficient number, since it is larger than the sum of its proper divisors (43188685022).

82197819538 is a wasteful number, since it uses less digits than its factorization.

82197819538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696591752.

The product of its digits is 8709120, while the sum is 61.

The spelling of 82197819538 in words is "eighty-two billion, one hundred ninety-seven million, eight hundred nineteen thousand, five hundred thirty-eight".