91194642898 has 8 divisors (see below), whose sum is σ = 136833189120. Its totient is φ = 45583579860.

The previous prime is 91194642823. The next prime is 91194642899. The reversal of 91194642898 is 89824649119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91194642899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6862498 + ... + 6875773.

It is an arithmetic number, because the mean of its divisors is an integer number (17104148640).

Almost surely, 2^91194642898 is an apocalyptic number.

91194642898 is a deficient number, since it is larger than the sum of its proper divisors (45638546222).

91194642898 is a wasteful number, since it uses less digits than its factorization.

91194642898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13741592.

The product of its digits is 8957952, while the sum is 61.

The spelling of 91194642898 in words is "ninety-one billion, one hundred ninety-four million, six hundred forty-two thousand, eight hundred ninety-eight".