725595136 has 66 divisors (see below), whose sum is σ = 1687411698. Its totient is φ = 310947840.

The previous prime is 725595131. The next prime is 725595149. The reversal of 725595136 is 631595527.

It can be written as a sum of positive squares in only one way, i.e., 443355136 + 282240000 = 21056^2 + 16800^2 .

It is a junction number, because it is equal to n+sod(n) for n = 725595092 and 725595101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725595131) 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, 42946 + ... + 57406.

Almost surely, 2^725595136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725595136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843705849).

725595136 is an abundant number, since it is smaller than the sum of its proper divisors (961816562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725595136 is a wasteful number, since it uses less digits than its factorization.

725595136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14495 (or 14470 counting only the distinct ones).

The product of its digits is 283500, while the sum is 43.

The square root of 725595136 is about 26936.8731667207. The cubic root of 725595136 is about 898.5966342751.

The spelling of 725595136 in words is "seven hundred twenty-five million, five hundred ninety-five thousand, one hundred thirty-six".