399665236952 has 16 divisors (see below), whose sum is σ = 756003934440. Its totient is φ = 198064187776.

The previous prime is 399665236951. The next prime is 399665236967. The reversal of 399665236952 is 259632566993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399665236951) 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, 221052878 + ... + 221054685.

Almost surely, 2^399665236952 is an apocalyptic number.

It is an amenable number.

399665236952 is a deficient number, since it is larger than the sum of its proper divisors (356338697488).

399665236952 is a wasteful number, since it uses less digits than its factorization.

399665236952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442107682 (or 442107678 counting only the distinct ones).

The product of its digits is 141717600, while the sum is 65.

The spelling of 399665236952 in words is "three hundred ninety-nine billion, six hundred sixty-five million, two hundred thirty-six thousand, nine hundred fifty-two".