3205561725 has 72 divisors (see below), whose sum is σ = 6067761440. Its totient is φ = 1613208960.

The previous prime is 3205561699. The next prime is 3205561783. The reversal of 3205561725 is 5271655023.

3205561725 is a `hidden beast` number, since 3 + 20 + 5 + 561 + 72 + 5 = 666.

It is not a de Polignac number, because 3205561725 - 2⁵ = 3205561693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3205561725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1182822 + ... + 1185528.

Almost surely, 2^3205561725 is an apocalyptic number.

It is an amenable number.

3205561725 is a deficient number, since it is larger than the sum of its proper divisors (2862199715).

3205561725 is a wasteful number, since it uses less digits than its factorization.

3205561725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019 (or 3011 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 3205561725 is about 56617.6803216098. The cubic root of 3205561725 is about 1474.4658374136.

The spelling of 3205561725 in words is "three billion, two hundred five million, five hundred sixty-one thousand, seven hundred twenty-five".