1604636100 has 54 divisors (see below), whose sum is σ = 5029645530. Its totient is φ = 427902720.

The previous prime is 1604636087. The next prime is 1604636107. The reversal of 1604636100 is 16364061.

1604636100 is a `hidden beast` number, since 1 + 6 + 0 + 46 + 3 + 610 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 7354944 + 1597281156 = 2712^2 + 39966^2 .

It is not an unprimeable number, because it can be changed into a prime (1604636107) 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 17 ways as a sum of consecutive naturals, for example, 890565 + ... + 892364.

Almost surely, 2^1604636100 is an apocalyptic number.

1604636100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604636100 is an abundant number, since it is smaller than the sum of its proper divisors (3425009430).

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

1604636100 is a wasteful number, since it uses less digits than its factorization.

1604636100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782949 (or 1782939 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1604636100 is about 40057.9093313668. The cubic root of 1604636100 is about 1170.7356758281.

It can be divided in two parts, 1604636 and 100, that added together give a triangular number (1604736 = T₁₇₉₁).

The spelling of 1604636100 in words is "one billion, six hundred four million, six hundred thirty-six thousand, one hundred".