1655256565 has 8 divisors (see below), whose sum is σ = 1988411040. Its totient is φ = 1322803152.

The previous prime is 1655256557. The next prime is 1655256599. The reversal of 1655256565 is 5656525561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1655256565 - 2³ = 1655256557 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 170055 + ... + 179524.

It is an arithmetic number, because the mean of its divisors is an integer number (248551380).

Almost surely, 2^1655256565 is an apocalyptic number.

It is an amenable number.

1655256565 is a deficient number, since it is larger than the sum of its proper divisors (333154475).

1655256565 is an equidigital number, since it uses as much as digits as its factorization.

1655256565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350531.

The product of its digits is 1350000, while the sum is 46.

The square root of 1655256565 is about 40684.8444141059. The cubic root of 1655256565 is about 1182.9192693119.

The spelling of 1655256565 in words is "one billion, six hundred fifty-five million, two hundred fifty-six thousand, five hundred sixty-five".