1604665455 has 32 divisors (see below), whose sum is σ = 2588371968. Its totient is φ = 848880000.

The previous prime is 1604665453. The next prime is 1604665457. The reversal of 1604665455 is 5545664061.

It is an interprime number because it is at equal distance from previous prime (1604665453) and next prime (1604665457).

It is not a de Polignac number, because 1604665455 - 2¹ = 1604665453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604665453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2038572 + ... + 2039358.

It is an arithmetic number, because the mean of its divisors is an integer number (80886624).

Almost surely, 2^1604665455 is an apocalyptic number.

1604665455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1604665455 is a deficient number, since it is larger than the sum of its proper divisors (983706513).

1604665455 is a wasteful number, since it uses less digits than its factorization.

1604665455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727.

The product of its (nonzero) digits is 432000, while the sum is 42.

The square root of 1604665455 is about 40058.2757367314. The cubic root of 1604665455 is about 1170.7428148790.

The spelling of 1604665455 in words is "one billion, six hundred four million, six hundred sixty-five thousand, four hundred fifty-five".