3925649025 has 27 divisors (see below), whose sum is σ = 7032957321. Its totient is φ = 2093178240.

The previous prime is 3925649023. The next prime is 3925649053. The reversal of 3925649025 is 5209465293.

The square root of 3925649025 is 62655.

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

3925649025 is a `hidden beast` number, since 3 + 92 + 56 + 490 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 497780721 + 3427868304 = 22311^2 + 58548^2 .

It is not a de Polignac number, because 3925649025 - 2¹ = 3925649023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (3925649023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 937737 + ... + 941913.

Almost surely, 2^3925649025 is an apocalyptic number.

3925649025 is the 62655-th square number.

3925649025 is the 31328-th centered octagonal number.

It is an amenable number.

3925649025 is a deficient number, since it is larger than the sum of its proper divisors (3107308296).

3925649025 is an frugal number, since it uses more digits than its factorization.

3925649025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8370 (or 4185 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The cubic root of 3925649025 is about 1577.5040741370.

The spelling of 3925649025 in words is "three billion, nine hundred twenty-five million, six hundred forty-nine thousand, twenty-five".