5646449400399 has 12 divisors (see below), whose sum is σ = 8215515187776. Its totient is φ = 3736822960032.

The previous prime is 5646449400377. The next prime is 5646449400401. The reversal of 5646449400399 is 9930049446465.

5646449400399 is a `hidden beast` number, since 5 + 6 + 464 + 49 + 40 + 0 + 3 + 99 = 666.

It is not a de Polignac number, because 5646449400399 - 2⁹ = 5646449399887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5646449404399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2289718719 + ... + 2289721184.

It is an arithmetic number, because the mean of its divisors is an integer number (684626265648).

Almost surely, 2^{5646449400399} is an apocalyptic number.

5646449400399 is a deficient number, since it is larger than the sum of its proper divisors (2569065787377).

5646449400399 is a wasteful number, since it uses less digits than its factorization.

5646449400399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579440046 (or 4579440043 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 63.

The spelling of 5646449400399 in words is "five trillion, six hundred forty-six billion, four hundred forty-nine million, four hundred thousand, three hundred ninety-nine".