399442131326005 has 16 divisors (see below), whose sum is σ = 489253530643200. Its totient is φ = 312978361389120.

The previous prime is 399442131326003. The next prime is 399442131326009. The reversal of 399442131326005 is 500623131244993.

It is not a de Polignac number, because 399442131326005 - 2¹ = 399442131326003 is a prime.

It is a super-2 number, since 2×399442131326005² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399442131326003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2498150910 + ... + 2498310799.

It is an arithmetic number, because the mean of its divisors is an integer number (30578345665200).

Almost surely, 2^{399442131326005} is an apocalyptic number.

It is an amenable number.

399442131326005 is a deficient number, since it is larger than the sum of its proper divisors (89811399317195).

399442131326005 is a wasteful number, since it uses less digits than its factorization.

399442131326005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4996462044.

The product of its (nonzero) digits is 4199040, while the sum is 52.

The spelling of 399442131326005 in words is "three hundred ninety-nine trillion, four hundred forty-two billion, one hundred thirty-one million, three hundred twenty-six thousand, five".