1606553404 has 24 divisors (see below), whose sum is σ = 2935231488. Its totient is φ = 767952240.

The previous prime is 1606553383. The next prime is 1606553419. The reversal of 1606553404 is 4043556061.

It is a self number, because there is not a number n which added to its sum of digits gives 1606553404.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 251409 + ... + 257719.

It is an arithmetic number, because the mean of its divisors is an integer number (122301312).

Almost surely, 2^1606553404 is an apocalyptic number.

It is an amenable number.

1606553404 is a deficient number, since it is larger than the sum of its proper divisors (1328678084).

1606553404 is a wasteful number, since it uses less digits than its factorization.

1606553404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105 (or 9103 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 1606553404 is about 40081.8338402823. The cubic root of 1606553404 is about 1171.2017758525.

The spelling of 1606553404 in words is "one billion, six hundred six million, five hundred fifty-three thousand, four hundred four".