65506651193 has 2 divisors, whose sum is σ = 65506651194. Its totient is φ = 65506651192.

The previous prime is 65506651169. The next prime is 65506651207. The reversal of 65506651193 is 39115660556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59901583504 + 5605067689 = 244748^2 + 74867^2 .

It is a cyclic number.

It is not a de Polignac number, because 65506651193 - 2²⁸ = 65238215737 is a prime.

It is a super-2 number, since 2×65506651193² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65506651153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32753325596 + 32753325597.

It is an arithmetic number, because the mean of its divisors is an integer number (32753325597).

Almost surely, 2^65506651193 is an apocalyptic number.

It is an amenable number.

65506651193 is a deficient number, since it is larger than the sum of its proper divisors (1).

65506651193 is an equidigital number, since it uses as much as digits as its factorization.

65506651193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 65506651193 in words is "sixty-five billion, five hundred six million, six hundred fifty-one thousand, one hundred ninety-three".