397518216519408 has 80 divisors (see below), whose sum is σ = 1033474950857856. Its totient is φ = 131660557367040.

The previous prime is 397518216519407. The next prime is 397518216519433. The reversal of 397518216519408 is 804915612815793.

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 15 ways as a sum of consecutive naturals, for example, 782306863 + ... + 782814833.

It is a 1-persistent number, because it is pandigital, but 2⋅397518216519408 = 795036433038816 is not.

Almost surely, 2^{397518216519408} is an apocalyptic number.

It is an amenable number.

397518216519408 is an abundant number, since it is smaller than the sum of its proper divisors (635956734338448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397518216519408 is a wasteful number, since it uses less digits than its factorization.

397518216519408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611982 (or 611976 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 69.

The spelling of 397518216519408 in words is "three hundred ninety-seven trillion, five hundred eighteen billion, two hundred sixteen million, five hundred nineteen thousand, four hundred eight".