32564646509 has 2 divisors, whose sum is σ = 32564646510. Its totient is φ = 32564646508.

The previous prime is 32564646479. The next prime is 32564646533. The reversal of 32564646509 is 90564646523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29634589609 + 2930056900 = 172147^2 + 54130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32564646509 is a prime.

It is a super-2 number, since 2×32564646509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32564640509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16282323254 + 16282323255.

It is an arithmetic number, because the mean of its divisors is an integer number (16282323255).

Almost surely, 2^32564646509 is an apocalyptic number.

It is an amenable number.

32564646509 is a deficient number, since it is larger than the sum of its proper divisors (1).

32564646509 is an equidigital number, since it uses as much as digits as its factorization.

32564646509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 32564646509 in words is "thirty-two billion, five hundred sixty-four million, six hundred forty-six thousand, five hundred nine".