65215455945091 has 2 divisors, whose sum is σ = 65215455945092. Its totient is φ = 65215455945090.

The previous prime is 65215455945023. The next prime is 65215455945131. The reversal of 65215455945091 is 19054955451256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65215455945091 - 2⁷ = 65215455944963 is a prime.

It is a super-2 number, since 2×65215455945091² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65215455945001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32607727972545 + 32607727972546.

It is an arithmetic number, because the mean of its divisors is an integer number (32607727972546).

Almost surely, 2^{65215455945091} is an apocalyptic number.

65215455945091 is a deficient number, since it is larger than the sum of its proper divisors (1).

65215455945091 is an equidigital number, since it uses as much as digits as its factorization.

65215455945091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600000, while the sum is 61.

The spelling of 65215455945091 in words is "sixty-five trillion, two hundred fifteen billion, four hundred fifty-five million, nine hundred forty-five thousand, ninety-one".