1604350656 has 168 divisors, whose sum is σ = 4953396240. Its totient is φ = 494616576.

The previous prime is 1604350621. The next prime is 1604350661. The reversal of 1604350656 is 6560534061.

1604350656 is a `hidden beast` number, since 1 + 60 + 43 + 506 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1604350656.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 576340 + ... + 579116.

Almost surely, 2^1604350656 is an apocalyptic number.

1604350656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604350656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476698120).

1604350656 is an abundant number, since it is smaller than the sum of its proper divisors (3349045584).

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

1604350656 is a wasteful number, since it uses less digits than its factorization.

1604350656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871 (or 2858 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1604350656 is about 40054.3462810217. The cubic root of 1604350656 is about 1170.6662521352. Note that the first 3 decimals are identical.

The spelling of 1604350656 in words is "one billion, six hundred four million, three hundred fifty thousand, six hundred fifty-six".