84198661826 has 4 divisors (see below), whose sum is σ = 126297992742. Its totient is φ = 42099330912.

The previous prime is 84198661801. The next prime is 84198661849. The reversal of 84198661826 is 62816689148.

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

It can be written as a sum of positive squares in only one way, i.e., 78905371801 + 5293290025 = 280901^2 + 72755^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21049665455 + ... + 21049665458.

Almost surely, 2^84198661826 is an apocalyptic number.

84198661826 is a deficient number, since it is larger than the sum of its proper divisors (42099330916).

84198661826 is a wasteful number, since it uses less digits than its factorization.

84198661826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42099330915.

The product of its digits is 7962624, while the sum is 59.

The spelling of 84198661826 in words is "eighty-four billion, one hundred ninety-eight million, six hundred sixty-one thousand, eight hundred twenty-six".