4079721308225 has 6 divisors (see below), whose sum is σ = 5058854422230. Its totient is φ = 3263777046560.

The previous prime is 4079721308209. The next prime is 4079721308227. The reversal of 4079721308225 is 5228031279704.

It is a Cunningham number, because it is equal to 2019832²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 4079721308224 = 1^2 + 2019832^2 .

It is not a de Polignac number, because 4079721308225 - 2⁴ = 4079721308209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4079721308227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81594426140 + ... + 81594426189.

It is an arithmetic number, because the mean of its divisors is an integer number (843142403705).

Almost surely, 2^{4079721308225} is an apocalyptic number.

It is an amenable number.

4079721308225 is a deficient number, since it is larger than the sum of its proper divisors (979133114005).

4079721308225 is a wasteful number, since it uses less digits than its factorization.

4079721308225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163188852339 (or 163188852334 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 4079721308225 in words is "four trillion, seventy-nine billion, seven hundred twenty-one million, three hundred eight thousand, two hundred twenty-five".