1606544004 has 48 divisors (see below), whose sum is σ = 4054675520. Its totient is φ = 492151680.

The previous prime is 1606543987. The next prime is 1606544021. The reversal of 1606544004 is 4004456061.

1606544004 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1606543987) and next prime (1606544021).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13239 + ... + 58209.

Almost surely, 2^1606544004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606544004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027337760).

1606544004 is an abundant number, since it is smaller than the sum of its proper divisors (2448131516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1606544004 is a wasteful number, since it uses less digits than its factorization.

1606544004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45220 (or 45218 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1606544004 is about 40081.7165800069. The cubic root of 1606544004 is about 1171.1994916006.

The spelling of 1606544004 in words is "one billion, six hundred six million, five hundred forty-four thousand, four".