726645625 has 20 divisors (see below), whose sum is σ = 912161140. Its totient is φ = 578664000.

The previous prime is 726645617. The next prime is 726645631. The reversal of 726645625 is 526546627.

It can be written as a sum of positive squares in 10 ways, for example, as 167417721 + 559227904 = 12939^2 + 23648^2 .

It is not a de Polignac number, because 726645625 - 2³ = 726645617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 140587 + ... + 145663.

It is an arithmetic number, because the mean of its divisors is an integer number (45608057).

Almost surely, 2^726645625 is an apocalyptic number.

It is an amenable number.

726645625 is a deficient number, since it is larger than the sum of its proper divisors (185515515).

726645625 is an equidigital number, since it uses as much as digits as its factorization.

726645625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326 (or 5311 counting only the distinct ones).

The product of its digits is 604800, while the sum is 43.

The square root of 726645625 is about 26956.3652037881. The cubic root of 726645625 is about 899.0300764951.

The spelling of 726645625 in words is "seven hundred twenty-six million, six hundred forty-five thousand, six hundred twenty-five".