725609237929 has 27 divisors (see below), whose sum is σ = 774882530877. Its totient is φ = 679369512888.

The previous prime is 725609237921. The next prime is 725609238023. The reversal of 725609237929 is 929732906527.

The square root of 725609237929 is 851827.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 725609237929 - 2³ = 725609237921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725609237921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1731764082 + ... + 1731764500.

Almost surely, 2^725609237929 is an apocalyptic number.

725609237929 is the 851827-th square number.

725609237929 is the 425914-th centered octagonal number.

It is an amenable number.

725609237929 is a deficient number, since it is larger than the sum of its proper divisors (49273292948).

725609237929 is an frugal number, since it uses more digits than its factorization.

725609237929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 725609237929 in words is "seven hundred twenty-five billion, six hundred nine million, two hundred thirty-seven thousand, nine hundred twenty-nine".