74196198978 has 32 divisors (see below), whose sum is σ = 162467069760. Its totient is φ = 22402522560.

The previous prime is 74196198961. The next prime is 74196198997. The reversal of 74196198978 is 87989169147.

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 15 ways as a sum of consecutive naturals, for example, 2010933 + ... + 2047496.

It is an arithmetic number, because the mean of its divisors is an integer number (5077095930).

Almost surely, 2^74196198978 is an apocalyptic number.

74196198978 is an abundant number, since it is smaller than the sum of its proper divisors (88270870782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74196198978 is a wasteful number, since it uses less digits than its factorization.

74196198978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058722.

The product of its digits is 54867456, while the sum is 69.

The spelling of 74196198978 in words is "seventy-four billion, one hundred ninety-six million, one hundred ninety-eight thousand, nine hundred seventy-eight".