397518216519434 has 16 divisors (see below), whose sum is σ = 596332945394880. Its totient is φ = 198740568811680.

The previous prime is 397518216519433. The next prime is 397518216519461. The reversal of 397518216519434 is 434915612815793.

It is a super-2 number, since 2×397518216519434² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397518216519433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230046049 + ... + 1230369179.

It is an arithmetic number, because the mean of its divisors is an integer number (37270809087180).

Almost surely, 2^{397518216519434} is an apocalyptic number.

397518216519434 is a deficient number, since it is larger than the sum of its proper divisors (198814728875446).

397518216519434 is a wasteful number, since it uses less digits than its factorization.

397518216519434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378605.

The product of its digits is 195955200, while the sum is 68.

The spelling of 397518216519434 in words is "three hundred ninety-seven trillion, five hundred eighteen billion, two hundred sixteen million, five hundred nineteen thousand, four hundred thirty-four".