194513668398 has 144 divisors (see below), whose sum is σ = 519804908064. Its totient is φ = 52234398720.

The previous prime is 194513668373. The next prime is 194513668399. The reversal of 194513668398 is 893866315491.

194513668398 is a `hidden beast` number, since 1 + 9 + 451 + 36 + 68 + 3 + 98 = 666.

194513668398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194513668399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11401911 + ... + 11418957.

It is an arithmetic number, because the mean of its divisors is an integer number (3609756306).

Almost surely, 2^194513668398 is an apocalyptic number.

194513668398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 194513668398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259902454032).

194513668398 is an abundant number, since it is smaller than the sum of its proper divisors (325291239666).

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

194513668398 is a wasteful number, since it uses less digits than its factorization.

194513668398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17847 (or 17837 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The spelling of 194513668398 in words is "one hundred ninety-four billion, five hundred thirteen million, six hundred sixty-eight thousand, three hundred ninety-eight".