725725310165 has 16 divisors (see below), whose sum is σ = 921182727168. Its totient is φ = 547730257536.

The previous prime is 725725310137. The next prime is 725725310171. The reversal of 725725310165 is 561013527527.

It is a cyclic number.

It is not a de Polignac number, because 725725310165 - 2⁸ = 725725309909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43215269 + ... + 43232058.

It is an arithmetic number, because the mean of its divisors is an integer number (57573920448).

Almost surely, 2^725725310165 is an apocalyptic number.

It is an amenable number.

725725310165 is a deficient number, since it is larger than the sum of its proper divisors (195457417003).

725725310165 is a wasteful number, since it uses less digits than its factorization.

725725310165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86447428.

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 725725310165 in words is "seven hundred twenty-five billion, seven hundred twenty-five million, three hundred ten thousand, one hundred sixty-five".