84197839450 has 24 divisors (see below), whose sum is σ = 159175331100. Its totient is φ = 33127017600.

The previous prime is 84197839433. The next prime is 84197839499. The reversal of 84197839450 is 5493879148.

It can be written as a sum of positive squares in 6 ways, for example, as 6754801 + 84191084649 = 2599^2 + 290157^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 13799875 + ... + 13805974.

Almost surely, 2^84197839450 is an apocalyptic number.

84197839450 is a deficient number, since it is larger than the sum of its proper divisors (74977491650).

84197839450 is a wasteful number, since it uses less digits than its factorization.

84197839450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27605922 (or 27605917 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 84197839450 in words is "eighty-four billion, one hundred ninety-seven million, eight hundred thirty-nine thousand, four hundred fifty".