1656233647 has 2 divisors, whose sum is σ = 1656233648. Its totient is φ = 1656233646.

The previous prime is 1656233599. The next prime is 1656233651. The reversal of 1656233647 is 7463326561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1656233647 - 2¹⁹ = 1655709359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656233147) by changing a digit.

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 as a sum of consecutive naturals, namely, 828116823 + 828116824.

It is an arithmetic number, because the mean of its divisors is an integer number (828116824).

Almost surely, 2^1656233647 is an apocalyptic number.

1656233647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656233647 is an equidigital number, since it uses as much as digits as its factorization.

1656233647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 43.

The square root of 1656233647 is about 40696.8505783924. The cubic root of 1656233647 is about 1183.1519788111.

The spelling of 1656233647 in words is "one billion, six hundred fifty-six million, two hundred thirty-three thousand, six hundred forty-seven".