65906532191 has 2 divisors, whose sum is σ = 65906532192. Its totient is φ = 65906532190.

The previous prime is 65906532157. The next prime is 65906532227. The reversal of 65906532191 is 19123560956.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65906532191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65906532151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32953266095 + 32953266096.

It is an arithmetic number, because the mean of its divisors is an integer number (32953266096).

Almost surely, 2^65906532191 is an apocalyptic number.

65906532191 is a deficient number, since it is larger than the sum of its proper divisors (1).

65906532191 is an equidigital number, since it uses as much as digits as its factorization.

65906532191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 65906532191 in words is "sixty-five billion, nine hundred six million, five hundred thirty-two thousand, one hundred ninety-one".