609830756809 has 2 divisors, whose sum is σ = 609830756810. Its totient is φ = 609830756808.

The previous prime is 609830756797. The next prime is 609830756863. The reversal of 609830756809 is 908657038906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 465673854409 + 144156902400 = 682403^2 + 379680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609830756809 is a prime.

It is not a weakly prime, because it can be changed into another prime (609830706809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304915378404 + 304915378405.

It is an arithmetic number, because the mean of its divisors is an integer number (304915378405).

Almost surely, 2^609830756809 is an apocalyptic number.

It is an amenable number.

609830756809 is a deficient number, since it is larger than the sum of its proper divisors (1).

609830756809 is an equidigital number, since it uses as much as digits as its factorization.

609830756809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 609830756809 in words is "six hundred nine billion, eight hundred thirty million, seven hundred fifty-six thousand, eight hundred nine".