1606131604 has 36 divisors (see below), whose sum is σ = 3566868480. Its totient is φ = 625764720.

The previous prime is 1606131599. The next prime is 1606131623. The reversal of 1606131604 is 4061316061.

It is a super-2 number, since 2×1606131604² = 5159317458735225632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370324 + ... + 374635.

It is an arithmetic number, because the mean of its divisors is an integer number (99079680).

Almost surely, 2^1606131604 is an apocalyptic number.

1606131604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1606131604 is an abundant number, since it is smaller than the sum of its proper divisors (1960736876).

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

1606131604 is a wasteful number, since it uses less digits than its factorization.

1606131604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744988 (or 744979 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1606131604 is about 40076.5717595705. The cubic root of 1606131604 is about 1171.0992673503.

Adding to 1606131604 its reverse (4061316061), we get a palindrome (5667447665).

The spelling of 1606131604 in words is "one billion, six hundred six million, one hundred thirty-one thousand, six hundred four".