65593931861 has 2 divisors, whose sum is σ = 65593931862. Its totient is φ = 65593931860.

The previous prime is 65593931827. The next prime is 65593931873. The reversal of 65593931861 is 16813939556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61618629361 + 3975302500 = 248231^2 + 63050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65593931861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65593931797 and 65593931806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65593931881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32796965930 + 32796965931.

It is an arithmetic number, because the mean of its divisors is an integer number (32796965931).

Almost surely, 2^65593931861 is an apocalyptic number.

It is an amenable number.

65593931861 is a deficient number, since it is larger than the sum of its proper divisors (1).

65593931861 is an equidigital number, since it uses as much as digits as its factorization.

65593931861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 56.

The spelling of 65593931861 in words is "sixty-five billion, five hundred ninety-three million, nine hundred thirty-one thousand, eight hundred sixty-one".