725779613309 has 2 divisors, whose sum is σ = 725779613310. Its totient is φ = 725779613308.

The previous prime is 725779613261. The next prime is 725779613359. The reversal of 725779613309 is 903316977527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708282144025 + 17497469284 = 841595^2 + 132278^2 .

It is an emirp because it is prime and its reverse (903316977527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725779613309 - 2²⁴ = 725762836093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725779613359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362889806654 + 362889806655.

It is an arithmetic number, because the mean of its divisors is an integer number (362889806655).

Almost surely, 2^725779613309 is an apocalyptic number.

It is an amenable number.

725779613309 is a deficient number, since it is larger than the sum of its proper divisors (1).

725779613309 is an equidigital number, since it uses as much as digits as its factorization.

725779613309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15002820, while the sum is 59.

The spelling of 725779613309 in words is "seven hundred twenty-five billion, seven hundred seventy-nine million, six hundred thirteen thousand, three hundred nine".