725444613 has 16 divisors (see below), whose sum is σ = 1075636800. Its totient is φ = 483222960.

The previous prime is 725444593. The next prime is 725444617. The reversal of 725444613 is 316444527.

725444613 is a `hidden beast` number, since 72 + 544 + 46 + 1 + 3 = 666.

It is not a de Polignac number, because 725444613 - 2⁹ = 725444101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725444617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23323 + ... + 44663.

It is an arithmetic number, because the mean of its divisors is an integer number (67227300).

Almost surely, 2^725444613 is an apocalyptic number.

It is an amenable number.

725444613 is a deficient number, since it is larger than the sum of its proper divisors (350192187).

725444613 is a wasteful number, since it uses less digits than its factorization.

725444613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22609 (or 22603 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 725444613 is about 26934.0790263933. The cubic root of 725444613 is about 898.5344927269.

The spelling of 725444613 in words is "seven hundred twenty-five million, four hundred forty-four thousand, six hundred thirteen".