194131888666884 has 243 divisors, whose sum is σ = 574771296655647. Its totient is φ = 55086882859008.

The previous prime is 194131888666867. The next prime is 194131888666897. The reversal of 194131888666884 is 488666888131491.

The square root of 194131888666884 is 13933122.

It is a perfect power (a square), and thus also a powerful number.

194131888666884 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 131718728626884 + 62413160040000 = 11476878^2 + 7900200^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 91875005412 + ... + 91875007524.

Almost surely, 2^{194131888666884} is an apocalyptic number.

194131888666884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

194131888666884 is the 13933122-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194131888666884

194131888666884 is an abundant number, since it is smaller than the sum of its proper divisors (380639407988763).

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

194131888666884 is an equidigital number, since it uses as much as digits as its factorization.

194131888666884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564 (or 2282 counting only the distinct ones).

The product of its digits is 3057647616, while the sum is 81.

The spelling of 194131888666884 in words is "one hundred ninety-four trillion, one hundred thirty-one billion, eight hundred eighty-eight million, six hundred sixty-six thousand, eight hundred eighty-four".