198378007634 has 16 divisors (see below), whose sum is σ = 304508244480. Its totient is φ = 96875578800.

The previous prime is 198378007621. The next prime is 198378007661. The reversal of 198378007634 is 436700873891.

It is a self number, because there is not a number n which added to its sum of digits gives 198378007634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310159 + ... + 1453709.

It is an arithmetic number, because the mean of its divisors is an integer number (19031765280).

Almost surely, 2^198378007634 is an apocalyptic number.

198378007634 is a deficient number, since it is larger than the sum of its proper divisors (106130236846).

198378007634 is a wasteful number, since it uses less digits than its factorization.

198378007634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159665.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 198378007634 in words is "one hundred ninety-eight billion, three hundred seventy-eight million, seven thousand, six hundred thirty-four".