395366565497 has 2 divisors, whose sum is σ = 395366565498. Its totient is φ = 395366565496.

The previous prime is 395366565449. The next prime is 395366565509. The reversal of 395366565497 is 794565663593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250684467856 + 144682097641 = 500684^2 + 380371^2 .

It is a cyclic number.

It is not a de Polignac number, because 395366565497 - 2³⁸ = 120488658553 is a prime.

It is a super-2 number, since 2×395366565497² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (395366565197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197683282748 + 197683282749.

It is an arithmetic number, because the mean of its divisors is an integer number (197683282749).

Almost surely, 2^395366565497 is an apocalyptic number.

It is an amenable number.

395366565497 is a deficient number, since it is larger than the sum of its proper divisors (1).

395366565497 is an equidigital number, since it uses as much as digits as its factorization.

395366565497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124000, while the sum is 68.

The spelling of 395366565497 in words is "three hundred ninety-five billion, three hundred sixty-six million, five hundred sixty-five thousand, four hundred ninety-seven".