1656050009 has 2 divisors, whose sum is σ = 1656050010. Its totient is φ = 1656050008.

The previous prime is 1656050003. The next prime is 1656050023. The reversal of 1656050009 is 9000506561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1587624025 + 68425984 = 39845^2 + 8272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656050009 - 2²⁴ = 1639272793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1656050003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828025004 + 828025005.

It is an arithmetic number, because the mean of its divisors is an integer number (828025005).

Almost surely, 2^1656050009 is an apocalyptic number.

It is an amenable number.

1656050009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656050009 is an equidigital number, since it uses as much as digits as its factorization.

1656050009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 1656050009 is about 40694.5943461782. The cubic root of 1656050009 is about 1183.1082491328.

The spelling of 1656050009 in words is "one billion, six hundred fifty-six million, fifty thousand, nine".