394219481161 has 15 divisors (see below), whose sum is σ = 433722321655. Its totient is φ = 358312280920.

The previous prime is 394219481141. The next prime is 394219481209. The reversal of 394219481161 is 161184912493.

The square root of 394219481161 is 627869.

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

It can be written as a sum of positive squares in only one way, i.e., 311287000761 + 82932480400 = 557931^2 + 287980^2 .

It is not a de Polignac number, because 394219481161 - 2⁹ = 394219480649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394219481141) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 75969555 + ... + 75974743.

Almost surely, 2^394219481161 is an apocalyptic number.

394219481161 is the 627869-th square number.

394219481161 is the 313935-th centered octagonal number.

It is an amenable number.

394219481161 is a deficient number, since it is larger than the sum of its proper divisors (39502840494).

394219481161 is an frugal number, since it uses more digits than its factorization.

394219481161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10422 (or 5200 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

Multiplying 394219481161 by its sum of digits (49), we get a square (19316754576889 = 4395083²).

The spelling of 394219481161 in words is "three hundred ninety-four billion, two hundred nineteen million, four hundred eighty-one thousand, one hundred sixty-one".