1925669659225 has 81 divisors (see below), whose sum is σ = 2662023191877. Its totient is φ = 1381201735680.

The previous prime is 1925669659223. The next prime is 1925669659237. The reversal of 1925669659225 is 5229569665291.

The square root of 1925669659225 is 1387685.

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 1266968606409 + 658701052816 = 1125597^2 + 811604^2 .

It is not a de Polignac number, because 1925669659225 - 2¹ = 1925669659223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1925669659223) 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 80 ways as a sum of consecutive naturals, for example, 3337382137 + ... + 3337382713.

Almost surely, 2^{1925669659225} is an apocalyptic number.

1925669659225 is the 1387685-th square number.

1925669659225 is the 693843-rd centered octagonal number.

It is an amenable number.

1925669659225 is a deficient number, since it is larger than the sum of its proper divisors (736353532652).

1925669659225 is an frugal number, since it uses more digits than its factorization.

1925669659225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 632 counting only the distinct ones).

The product of its digits is 157464000, while the sum is 67.

The spelling of 1925669659225 in words is "one trillion, nine hundred twenty-five billion, six hundred sixty-nine million, six hundred fifty-nine thousand, two hundred twenty-five".