65910531091 has 2 divisors, whose sum is σ = 65910531092. Its totient is φ = 65910531090.

The previous prime is 65910531083. The next prime is 65910531119. The reversal of 65910531091 is 19013501956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65910531091 - 2³ = 65910531083 is a prime.

It is not a weakly prime, because it can be changed into another prime (65910531041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32955265545 + 32955265546.

It is an arithmetic number, because the mean of its divisors is an integer number (32955265546).

Almost surely, 2^65910531091 is an apocalyptic number.

65910531091 is a deficient number, since it is larger than the sum of its proper divisors (1).

65910531091 is an equidigital number, since it uses as much as digits as its factorization.

65910531091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 40.

The spelling of 65910531091 in words is "sixty-five billion, nine hundred ten million, five hundred thirty-one thousand, ninety-one".