673425390625 has 81 divisors (see below), whose sum is σ = 920628923169. Its totient is φ = 492375000000.

The previous prime is 673425390613. The next prime is 673425390629. The reversal of 673425390625 is 526093524376.

The square root of 673425390625 is 820625.

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

It can be written as a sum of positive squares in 40 ways, for example, as 89032414689 + 584392975936 = 298383^2 + 764456^2 .

It is not a de Polignac number, because 673425390625 - 2⁷ = 673425390497 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673425390629) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 6667578075 + ... + 6667578175.

Almost surely, 2^673425390625 is an apocalyptic number.

673425390625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

673425390625 is the 820625-th square number.

673425390625 is the 410313-rd centered octagonal number.

It is an amenable number.

673425390625 is a deficient number, since it is larger than the sum of its proper divisors (247203532544).

673425390625 is an frugal number, since it uses more digits than its factorization.

673425390625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 52.

The spelling of 673425390625 in words is "six hundred seventy-three billion, four hundred twenty-five million, three hundred ninety thousand, six hundred twenty-five".