43451328357797 has 2 divisors, whose sum is σ = 43451328357798. Its totient is φ = 43451328357796.

The previous prime is 43451328357781. The next prime is 43451328357923. The reversal of 43451328357797 is 79775382315434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38753189742436 + 4698138615361 = 6225206^2 + 2167519^2 .

It is a cyclic number.

It is not a de Polignac number, because 43451328357797 - 2⁴ = 43451328357781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43451328357737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21725664178898 + 21725664178899.

It is an arithmetic number, because the mean of its divisors is an integer number (21725664178899).

Almost surely, 2^{43451328357797} is an apocalyptic number.

It is an amenable number.

43451328357797 is a deficient number, since it is larger than the sum of its proper divisors (1).

43451328357797 is an equidigital number, since it uses as much as digits as its factorization.

43451328357797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 533433600, while the sum is 68.

The spelling of 43451328357797 in words is "forty-three trillion, four hundred fifty-one billion, three hundred twenty-eight million, three hundred fifty-seven thousand, seven hundred ninety-seven".