6405920144530 has 16 divisors (see below), whose sum is σ = 11531253031704. Its totient is φ = 2562235441920.

The previous prime is 6405920144501. The next prime is 6405920144539. The reversal of 6405920144530 is 354410295046.

It can be written as a sum of positive squares in 4 ways, for example, as 6398011066041 + 7909078489 = 2529429^2 + 88933^2 .

It is not an unprimeable number, because it can be changed into a prime (6405920144539) 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 7 ways as a sum of consecutive naturals, for example, 16373991 + ... + 16760650.

Almost surely, 2^{6405920144530} is an apocalyptic number.

6405920144530 is a deficient number, since it is larger than the sum of its proper divisors (5125332887174).

6405920144530 is a wasteful number, since it uses less digits than its factorization.

6405920144530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33153981.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 6405920144530 in words is "six trillion, four hundred five billion, nine hundred twenty million, one hundred forty-four thousand, five hundred thirty".