745243725625 has 45 divisors (see below), whose sum is σ = 1083518093691. Its totient is φ = 510920676000.

The previous prime is 745243725613. The next prime is 745243725643. The reversal of 745243725625 is 526527342547.

It is a happy number.

The square root of 745243725625 is 863275.

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

It can be written as a sum of positive squares in 7 ways, for example, as 676425647401 + 68818078224 = 822451^2 + 262332^2 .

It is not a de Polignac number, because 745243725625 - 2⁹ = 745243725113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 151070659 + ... + 151075591.

Almost surely, 2^745243725625 is an apocalyptic number.

745243725625 is the 863275-th square number.

745243725625 is the 431638-th centered octagonal number.

It is an amenable number.

745243725625 is a deficient number, since it is larger than the sum of its proper divisors (338274368066).

745243725625 is an frugal number, since it uses more digits than its factorization.

745243725625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9900 (or 4945 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 52.

The spelling of 745243725625 in words is "seven hundred forty-five billion, two hundred forty-three million, seven hundred twenty-five thousand, six hundred twenty-five".