399240184499 has 16 divisors (see below), whose sum is σ = 444791719680. Its totient is φ = 355860794880.

The previous prime is 399240184481. The next prime is 399240184501. The reversal of 399240184499 is 994481042993.

It is not a de Polignac number, because 399240184499 - 2⁸ = 399240184243 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399240184099) 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, 899714 + ... + 1268055.

It is an arithmetic number, because the mean of its divisors is an integer number (27799482480).

Almost surely, 2^399240184499 is an apocalyptic number.

399240184499 is a deficient number, since it is larger than the sum of its proper divisors (45551535181).

399240184499 is a wasteful number, since it uses less digits than its factorization.

399240184499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168270.

The product of its (nonzero) digits is 20155392, while the sum is 62.

The spelling of 399240184499 in words is "three hundred ninety-nine billion, two hundred forty million, one hundred eighty-four thousand, four hundred ninety-nine".