399341729665 has 8 divisors (see below), whose sum is σ = 479226938688. Its totient is φ = 319462141680.

The previous prime is 399341729629. The next prime is 399341729693. The reversal of 399341729665 is 566927143993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399341729665 - 2²¹ = 399339632513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399341729597 and 399341729606.

It is an unprimeable number.

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, 1247347 + ... + 1534456.

It is an arithmetic number, because the mean of its divisors is an integer number (59903367336).

Almost surely, 2^399341729665 is an apocalyptic number.

It is an amenable number.

399341729665 is a deficient number, since it is larger than the sum of its proper divisors (79885209023).

399341729665 is a wasteful number, since it uses less digits than its factorization.

399341729665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810519.

The product of its digits is 66134880, while the sum is 64.

The spelling of 399341729665 in words is "three hundred ninety-nine billion, three hundred forty-one million, seven hundred twenty-nine thousand, six hundred sixty-five".