194434159921225 has 81 divisors (see below), whose sum is σ = 282777243906933. Its totient is φ = 132234301301760.

The previous prime is 194434159921219. The next prime is 194434159921241. The reversal of 194434159921225 is 522129951434491.

It is a happy number.

The square root of 194434159921225 is 13943965.

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

It can be written as a sum of positive squares in 4 ways, for example, as 63405753849529 + 131028406071696 = 7962773^2 + 11446764^2 .

It is not a de Polignac number, because 194434159921225 - 2⁹ = 194434159920713 is a prime.

It is a Duffinian number.

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, 61980922857 + ... + 61980925993.

Almost surely, 2^{194434159921225} is an apocalyptic number.

194434159921225 is the 13943965-th square number.

194434159921225 is the 6971983-rd centered octagonal number.

It is an amenable number.

194434159921225 is a deficient number, since it is larger than the sum of its proper divisors (88343083985708).

194434159921225 is an frugal number, since it uses more digits than its factorization.

194434159921225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552 (or 3276 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 61.

The spelling of 194434159921225 in words is "one hundred ninety-four trillion, four hundred thirty-four billion, one hundred fifty-nine million, nine hundred twenty-one thousand, two hundred twenty-five".