6402404521161 has 24 divisors (see below), whose sum is σ = 10088914309344. Its totient is φ = 3880138671360.

The previous prime is 6402404521111. The next prime is 6402404521189. The reversal of 6402404521161 is 1611254042046.

6402404521161 is a `hidden beast` number, since 6 + 4 + 0 + 2 + 40 + 452 + 1 + 161 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-6402404521161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6402404521111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2815650 + ... + 4553316.

It is an arithmetic number, because the mean of its divisors is an integer number (420371429556).

Almost surely, 2^{6402404521161} is an apocalyptic number.

It is an amenable number.

6402404521161 is a deficient number, since it is larger than the sum of its proper divisors (3686509788183).

6402404521161 is a wasteful number, since it uses less digits than its factorization.

6402404521161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774901 (or 1774898 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 6402404521161 in words is "six trillion, four hundred two billion, four hundred four million, five hundred twenty-one thousand, one hundred sixty-one".