399765356326 has 16 divisors (see below), whose sum is σ = 685576394784. Its totient is φ = 171261921024.

The previous prime is 399765356321. The next prime is 399765356329. The reversal of 399765356326 is 623653567993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399765356321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5469805 + ... + 5542408.

It is an arithmetic number, because the mean of its divisors is an integer number (42848524674).

Almost surely, 2^399765356326 is an apocalyptic number.

399765356326 is a deficient number, since it is larger than the sum of its proper divisors (285811038458).

399765356326 is a wasteful number, since it uses less digits than its factorization.

399765356326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014815.

The product of its digits is 165337200, while the sum is 64.

The spelling of 399765356326 in words is "three hundred ninety-nine billion, seven hundred sixty-five million, three hundred fifty-six thousand, three hundred twenty-six".