397518216519007 has 2 divisors, whose sum is σ = 397518216519008. Its totient is φ = 397518216519006.

The previous prime is 397518216518953. The next prime is 397518216519019. The reversal of 397518216519007 is 700915612815793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397518216519007 - 2³¹ = 397516069035359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397518216519007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397518216519407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198759108259503 + 198759108259504.

It is an arithmetic number, because the mean of its divisors is an integer number (198759108259504).

Almost surely, 2^{397518216519007} is an apocalyptic number.

397518216519007 is a deficient number, since it is larger than the sum of its proper divisors (1).

397518216519007 is an equidigital number, since it uses as much as digits as its factorization.

397518216519007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28576800, while the sum is 64.

The spelling of 397518216519007 in words is "three hundred ninety-seven trillion, five hundred eighteen billion, two hundred sixteen million, five hundred nineteen thousand, seven".