1655936563 has 2 divisors, whose sum is σ = 1655936564. Its totient is φ = 1655936562.

The previous prime is 1655936551. The next prime is 1655936587. The reversal of 1655936563 is 3656395561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655936563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1655936593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827968281 + 827968282.

It is an arithmetic number, because the mean of its divisors is an integer number (827968282).

Almost surely, 2^1655936563 is an apocalyptic number.

1655936563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655936563 is an equidigital number, since it uses as much as digits as its factorization.

1655936563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187000, while the sum is 49.

The square root of 1655936563 is about 40693.2004516725. The cubic root of 1655936563 is about 1183.0812326453.

The spelling of 1655936563 in words is "one billion, six hundred fifty-five million, nine hundred thirty-six thousand, five hundred sixty-three".