194468888864490 has 128 divisors (see below), whose sum is σ = 479120261760000. Its totient is φ = 50497861241856.

The previous prime is 194468888864363. The next prime is 194468888864531. The reversal of 194468888864490 is 94468888864491.

It is a junction number, because it is equal to n+sod(n) for n = 194468888864397 and 194468888864406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2094417586 + ... + 2094510434.

It is an arithmetic number, because the mean of its divisors is an integer number (3743127045000).

Almost surely, 2^{194468888864490} is an apocalyptic number.

194468888864490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 194468888864490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239560130880000).

194468888864490 is an abundant number, since it is smaller than the sum of its proper divisors (284651372895510).

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

194468888864490 is a wasteful number, since it uses less digits than its factorization.

194468888864490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104084.

The product of its (nonzero) digits is 24461180928, while the sum is 87.

Subtracting from 194468888864490 its reverse (94468888864491), we obtain a palindrome (99999999999999).

The spelling of 194468888864490 in words is "one hundred ninety-four trillion, four hundred sixty-eight billion, eight hundred eighty-eight million, eight hundred sixty-four thousand, four hundred ninety".