725744745 has 32 divisors (see below), whose sum is σ = 1407507840. Its totient is φ = 351875520.

The previous prime is 725744743. The next prime is 725744753. The reversal of 725744745 is 547447527.

725744745 is a `hidden beast` number, since 7 + 2 + 574 + 4 + 74 + 5 = 666.

It is not a de Polignac number, because 725744745 - 2¹ = 725744743 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 725744745.

It is not an unprimeable number, because it can be changed into a prime (725744743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242874 + ... + 245843.

It is an arithmetic number, because the mean of its divisors is an integer number (43984620).

Almost surely, 2^725744745 is an apocalyptic number.

It is an amenable number.

725744745 is a deficient number, since it is larger than the sum of its proper divisors (681763095).

725744745 is a wasteful number, since it uses less digits than its factorization.

725744745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488742 (or 488736 counting only the distinct ones).

The product of its digits is 1097600, while the sum is 45.

The square root of 725744745 is about 26939.6500534064. The cubic root of 725744745 is about 898.6583899743.

It can be divided in two parts, 7 and 25744745, that added together give a palindrome (25744752).

The spelling of 725744745 in words is "seven hundred twenty-five million, seven hundred forty-four thousand, seven hundred forty-five".