3250257305409 has 9 divisors (see below), whose sum is σ = 4694823920163. Its totient is φ = 2166834597912.

The previous prime is 3250257305401. The next prime is 3250257305429. The reversal of 3250257305409 is 9045037520523.

The square root of 3250257305409 is 1802847.

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

3250257305409 is a `hidden beast` number, since 3 + 2 + 50 + 2 + 57 + 3 + 0 + 540 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3243251615409 + 7005690000 = 1800903^2 + 83700^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 3250257305409 - 2³ = 3250257305401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3250257305401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5108067 + ... + 5709015.

Almost surely, 2^{3250257305409} is an apocalyptic number.

3250257305409 is the 1802847-th square number.

3250257305409 is the 901424-th centered octagonal number.

It is an amenable number.

3250257305409 is a deficient number, since it is larger than the sum of its proper divisors (1444566614754).

3250257305409 is an frugal number, since it uses more digits than its factorization.

3250257305409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201904 (or 600952 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

The spelling of 3250257305409 in words is "three trillion, two hundred fifty billion, two hundred fifty-seven million, three hundred five thousand, four hundred nine".