1604405055 has 16 divisors (see below), whose sum is σ = 2800416384. Its totient is φ = 777893280.

The previous prime is 1604405041. The next prime is 1604405057. The reversal of 1604405055 is 5505044061.

It is not a de Polignac number, because 1604405055 - 2⁷ = 1604404927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604405057) 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 15 ways as a sum of consecutive naturals, for example, 4861669 + ... + 4861998.

It is an arithmetic number, because the mean of its divisors is an integer number (175026024).

Almost surely, 2^1604405055 is an apocalyptic number.

1604405055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1604405055 is a deficient number, since it is larger than the sum of its proper divisors (1196011329).

1604405055 is a wasteful number, since it uses less digits than its factorization.

1604405055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723686.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1604405055 is about 40055.0253401493. The cubic root of 1604405055 is about 1170.6794833145.

The spelling of 1604405055 in words is "one billion, six hundred four million, four hundred five thousand, fifty-five".