725106109989 has 4 divisors (see below), whose sum is σ = 966808146656. Its totient is φ = 483404073324.

The previous prime is 725106109969. The next prime is 725106109991. The reversal of 725106109989 is 989901601527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 725106109989 - 2⁹ = 725106109477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725106109919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120851018329 + ... + 120851018334.

It is an arithmetic number, because the mean of its divisors is an integer number (241702036664).

Almost surely, 2^725106109989 is an apocalyptic number.

It is an amenable number.

725106109989 is a deficient number, since it is larger than the sum of its proper divisors (241702036667).

725106109989 is a wasteful number, since it uses less digits than its factorization.

725106109989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241702036666.

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 725106109989 in words is "seven hundred twenty-five billion, one hundred six million, one hundred nine thousand, nine hundred eighty-nine".