194908122256 has 135 divisors (see below), whose sum is σ = 412244636139. Its totient is φ = 89257469184.

The previous prime is 194908122251. The next prime is 194908122307. The reversal of 194908122256 is 652221809491.

The square root of 194908122256 is 441484.

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

194908122256 is digitally balanced in base 2, 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 11175872656 + 183732249600 = 105716^2 + 428640^2 .

It is a super-2 number, since 2×194908122256² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194908122251) 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 26 ways as a sum of consecutive naturals, for example, 1241452930 + ... + 1241453086.

Almost surely, 2^194908122256 is an apocalyptic number.

194908122256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

194908122256 is the 441484-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194908122256

194908122256 is an abundant number, since it is smaller than the sum of its proper divisors (217336513883).

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

194908122256 is an equidigital number, since it uses as much as digits as its factorization.

194908122256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

Multiplying 194908122256 by its sum of digits (49), we get a square (9550497990544 = 3090388²).

The spelling of 194908122256 in words is "one hundred ninety-four billion, nine hundred eight million, one hundred twenty-two thousand, two hundred fifty-six".