725728313431 has 4 divisors (see below), whose sum is σ = 791703614664. Its totient is φ = 659753012200.

The previous prime is 725728313381. The next prime is 725728313461. The reversal of 725728313431 is 134313827527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725728313431 - 2¹¹ = 725728311383 is a prime.

It is a super-2 number, since 2×725728313431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725728313461) 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, 32987650600 + ... + 32987650621.

It is an arithmetic number, because the mean of its divisors is an integer number (197925903666).

Almost surely, 2^725728313431 is an apocalyptic number.

725728313431 is a deficient number, since it is larger than the sum of its proper divisors (65975301233).

725728313431 is a wasteful number, since it uses less digits than its factorization.

725728313431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65975301232.

The product of its digits is 846720, while the sum is 46.

The spelling of 725728313431 in words is "seven hundred twenty-five billion, seven hundred twenty-eight million, three hundred thirteen thousand, four hundred thirty-one".