725652437617 has 4 divisors (see below), whose sum is σ = 732309799540. Its totient is φ = 718995075696.

The previous prime is 725652437603. The next prime is 725652437641. The reversal of 725652437617 is 716734256527.

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

It can be written as a sum of positive squares in 2 ways, for example, as 535518067681 + 190134369936 = 731791^2 + 436044^2 .

It is a cyclic number.

It is not a de Polignac number, because 725652437617 - 2³⁹ = 175896623729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725652477617) 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, 3328680798 + ... + 3328681015.

It is an arithmetic number, because the mean of its divisors is an integer number (183077449885).

Almost surely, 2^725652437617 is an apocalyptic number.

It is an amenable number.

725652437617 is a deficient number, since it is larger than the sum of its proper divisors (6657361923).

725652437617 is a wasteful number, since it uses less digits than its factorization.

725652437617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657361922.

The product of its digits is 14817600, while the sum is 55.

The spelling of 725652437617 in words is "seven hundred twenty-five billion, six hundred fifty-two million, four hundred thirty-seven thousand, six hundred seventeen".