1604311553 has 8 divisors (see below), whose sum is σ = 1767900288. Its totient is φ = 1446462864.

The previous prime is 1604311547. The next prime is 1604311559. The reversal of 1604311553 is 3551134061.

It is an interprime number because it is at equal distance from previous prime (1604311547) and next prime (1604311559).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1604311553 - 2⁸ = 1604311297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1604311559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434425 + ... + 1435542.

It is an arithmetic number, because the mean of its divisors is an integer number (220987536).

Almost surely, 2^1604311553 is an apocalyptic number.

1604311553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1604311553 is a deficient number, since it is larger than the sum of its proper divisors (163588735).

1604311553 is a wasteful number, since it uses less digits than its factorization.

1604311553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870023.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1604311553 is about 40053.8581537409. The cubic root of 1604311553 is about 1170.6567411358.

The spelling of 1604311553 in words is "one billion, six hundred four million, three hundred eleven thousand, five hundred fifty-three".