4397136394225 has 27 divisors (see below), whose sum is σ = 5754784588833. Its totient is φ = 3332415551040.

The previous prime is 4397136394219. The next prime is 4397136394237. The reversal of 4397136394225 is 5224936317934.

The square root of 4397136394225 is 2096935.

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 895761923809 + 3501374470416 = 946447^2 + 1871196^2 .

It is not a de Polignac number, because 4397136394225 - 2²³ = 4397128005617 is a prime.

It is a super-2 number, since 2×4397136394225² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4397136394225.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 199197789 + ... + 199219861.

Almost surely, 2^{4397136394225} is an apocalyptic number.

4397136394225 is the 2096935-th square number.

4397136394225 is the 1048468-th centered octagonal number.

It is an amenable number.

4397136394225 is a deficient number, since it is larger than the sum of its proper divisors (1357648194608).

4397136394225 is an frugal number, since it uses more digits than its factorization.

4397136394225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44194 (or 22097 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 58.

The spelling of 4397136394225 in words is "four trillion, three hundred ninety-seven billion, one hundred thirty-six million, three hundred ninety-four thousand, two hundred twenty-five".