725652322165 has 4 divisors (see below), whose sum is σ = 870782786604. Its totient is φ = 580521857728.

The previous prime is 725652322163. The next prime is 725652322169. The reversal of 725652322165 is 561223256527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 371796282001 + 353856040164 = 609751^2 + 594858^2 .

It is a cyclic number.

It is not a de Polignac number, because 725652322165 - 2¹ = 725652322163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725652322163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72565232212 + ... + 72565232221.

It is an arithmetic number, because the mean of its divisors is an integer number (217695696651).

Almost surely, 2^725652322165 is an apocalyptic number.

It is an amenable number.

725652322165 is a deficient number, since it is larger than the sum of its proper divisors (145130464439).

725652322165 is a wasteful number, since it uses less digits than its factorization.

725652322165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145130464438.

The product of its digits is 1512000, while the sum is 46.

The spelling of 725652322165 in words is "seven hundred twenty-five billion, six hundred fifty-two million, three hundred twenty-two thousand, one hundred sixty-five".