198268127078 has 16 divisors (see below), whose sum is σ = 340761975840. Its totient is φ = 84753614976.

The previous prime is 198268127009. The next prime is 198268127089. The reversal of 198268127078 is 870721862891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18197651 + ... + 18208542.

It is an arithmetic number, because the mean of its divisors is an integer number (21297623490).

Almost surely, 2^198268127078 is an apocalyptic number.

198268127078 is a deficient number, since it is larger than the sum of its proper divisors (142493848762).

198268127078 is a wasteful number, since it uses less digits than its factorization.

198268127078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36406591.

The product of its (nonzero) digits is 5419008, while the sum is 59.

The spelling of 198268127078 in words is "one hundred ninety-eight billion, two hundred sixty-eight million, one hundred twenty-seven thousand, seventy-eight".