399268688636667 has 24 divisors (see below), whose sum is σ = 566275813441536. Its totient is φ = 250184109826224.

The previous prime is 399268688636617. The next prime is 399268688636677. The reversal of 399268688636667 is 766636886862993.

It is not a de Polignac number, because 399268688636667 - 2¹⁵ = 399268688603899 is a prime.

It is a super-2 number, since 2×399268688636667² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399268688636617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1451315803 + ... + 1451590884.

It is an arithmetic number, because the mean of its divisors is an integer number (23594825560064).

Almost surely, 2^{399268688636667} is an apocalyptic number.

399268688636667 is a deficient number, since it is larger than the sum of its proper divisors (167007124804869).

399268688636667 is a wasteful number, since it uses less digits than its factorization.

399268688636667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902906855 (or 2902906836 counting only the distinct ones).

The product of its digits is 243799621632, while the sum is 93.

The spelling of 399268688636667 in words is "three hundred ninety-nine trillion, two hundred sixty-eight billion, six hundred eighty-eight million, six hundred thirty-six thousand, six hundred sixty-seven".