43804397025 has 45 divisors (see below), whose sum is σ = 81158335203. Its totient is φ = 23357322000.

The previous prime is 43804396997. The next prime is 43804397027. The reversal of 43804397025 is 52079340834.

The square root of 43804397025 is 209295.

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., 15769582929 + 28034814096 = 125577^2 + 167436^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 43804397025 - 2⁹ = 43804396513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43804397027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 9415950 + ... + 9420600.

Almost surely, 2^43804397025 is an apocalyptic number.

43804397025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

43804397025 is the 209295-th square number.

43804397025 is the 104648-th centered octagonal number.

It is an amenable number.

43804397025 is a deficient number, since it is larger than the sum of its proper divisors (37353938178).

43804397025 is an frugal number, since it uses more digits than its factorization.

43804397025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324 (or 4659 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 43804397025 in words is "forty-three billion, eight hundred four million, three hundred ninety-seven thousand, twenty-five".