399492666294993 has 12 divisors (see below), whose sum is σ = 577259716819968. Its totient is φ = 266229326784120.

The previous prime is 399492666294983. The next prime is 399492666295049.

399492666294993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 399492666294993 - 2⁹ = 399492666294481 is a prime.

It is a super-2 number, since 2×399492666294993² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (399492666294983) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8259758853 + ... + 8259807218.

It is an arithmetic number, because the mean of its divisors is an integer number (48104976401664).

Almost surely, 2^{399492666294993} is an apocalyptic number.

It is an amenable number.

399492666294993 is a deficient number, since it is larger than the sum of its proper divisors (177767050524975).

399492666294993 is a wasteful number, since it uses less digits than its factorization.

399492666294993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16519568764 (or 16519568761 counting only the distinct ones).

The product of its digits is 66119763456, while the sum is 90.

The spelling of 399492666294993 in words is "three hundred ninety-nine trillion, four hundred ninety-two billion, six hundred sixty-six million, two hundred ninety-four thousand, nine hundred ninety-three".