397518216519406 has 8 divisors (see below), whose sum is σ = 596298650184864. Its totient is φ = 198751999791120.

The previous prime is 397518216519353. The next prime is 397518216519407. The reversal of 397518216519406 is 604915612815793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397518216519407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3554164390 + ... + 3554276233.

It is an arithmetic number, because the mean of its divisors is an integer number (74537331273108).

It is a 2-persistent number, because it is pandigital, and so is 2⋅397518216519406 = 795036433038812, but 3⋅397518216519406 = 1192554649558218 is not.

Almost surely, 2^{397518216519406} is an apocalyptic number.

397518216519406 is a deficient number, since it is larger than the sum of its proper divisors (198780433665458).

397518216519406 is a wasteful number, since it uses less digits than its factorization.

397518216519406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108468586.

The product of its (nonzero) digits is 97977600, while the sum is 67.

The spelling of 397518216519406 in words is "three hundred ninety-seven trillion, five hundred eighteen billion, two hundred sixteen million, five hundred nineteen thousand, four hundred six".