65451899815453 has 2 divisors, whose sum is σ = 65451899815454. Its totient is φ = 65451899815452.

The previous prime is 65451899815451. The next prime is 65451899815469. The reversal of 65451899815453 is 35451899815456.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45714609742564 + 19737290072889 = 6761258^2 + 4442667^2 .

It is a cyclic number.

It is not a de Polignac number, because 65451899815453 - 2¹ = 65451899815451 is a prime.

Together with 65451899815451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65451899815451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32725949907726 + 32725949907727.

It is an arithmetic number, because the mean of its divisors is an integer number (32725949907727).

Almost surely, 2^{65451899815453} is an apocalyptic number.

It is an amenable number.

65451899815453 is a deficient number, since it is larger than the sum of its proper divisors (1).

65451899815453 is an equidigital number, since it uses as much as digits as its factorization.

65451899815453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120000, while the sum is 73.

The spelling of 65451899815453 in words is "sixty-five trillion, four hundred fifty-one billion, eight hundred ninety-nine million, eight hundred fifteen thousand, four hundred fifty-three".