1655256689 has 2 divisors, whose sum is σ = 1655256690. Its totient is φ = 1655256688.

The previous prime is 1655256671. The next prime is 1655256719. The reversal of 1655256689 is 9866525561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254576400 + 400680289 = 35420^2 + 20017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655256689 - 2²⁰ = 1654208113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1655256689.

It is not a weakly prime, because it can be changed into another prime (1655256089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827628344 + 827628345.

It is an arithmetic number, because the mean of its divisors is an integer number (827628345).

Almost surely, 2^1655256689 is an apocalyptic number.

It is an amenable number.

1655256689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655256689 is an equidigital number, since it uses as much as digits as its factorization.

1655256689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 53.

The square root of 1655256689 is about 40684.8459380148. The cubic root of 1655256689 is about 1182.9192988505.

The spelling of 1655256689 in words is "one billion, six hundred fifty-five million, two hundred fifty-six thousand, six hundred eighty-nine".