399553838366 has 16 divisors (see below), whose sum is σ = 599952762240. Its totient is φ = 199569640320.

The previous prime is 399553838363. The next prime is 399553838389. The reversal of 399553838366 is 663838355993.

It is a junction number, because it is equal to n+sod(n) for n = 399553838296 and 399553838305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399553838363) 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, 25952531 + ... + 25967921.

It is an arithmetic number, because the mean of its divisors is an integer number (37497047640).

Almost surely, 2^399553838366 is an apocalyptic number.

399553838366 is a deficient number, since it is larger than the sum of its proper divisors (200398923874).

399553838366 is a wasteful number, since it uses less digits than its factorization.

399553838366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28019.

The product of its digits is 377913600, while the sum is 68.

The spelling of 399553838366 in words is "three hundred ninety-nine billion, five hundred fifty-three million, eight hundred thirty-eight thousand, three hundred sixty-six".