65630402609 has 2 divisors, whose sum is σ = 65630402610. Its totient is φ = 65630402608.

The previous prime is 65630402587. The next prime is 65630402659. The reversal of 65630402609 is 90620403656.

65630402609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48074947600 + 17555455009 = 219260^2 + 132497^2 .

It is a cyclic number.

It is not a de Polignac number, because 65630402609 - 2⁸ = 65630402353 is a prime.

It is not a weakly prime, because it can be changed into another prime (65630402659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32815201304 + 32815201305.

It is an arithmetic number, because the mean of its divisors is an integer number (32815201305).

Almost surely, 2^65630402609 is an apocalyptic number.

It is an amenable number.

65630402609 is a deficient number, since it is larger than the sum of its proper divisors (1).

65630402609 is an equidigital number, since it uses as much as digits as its factorization.

65630402609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 65630402609 in words is "sixty-five billion, six hundred thirty million, four hundred two thousand, six hundred nine".