1601005656 has 16 divisors (see below), whose sum is σ = 4002514200. Its totient is φ = 533668544.

The previous prime is 1601005631. The next prime is 1601005667. The reversal of 1601005656 is 6565001061.

It is a super-2 number, since 2×1601005656² = 5126438221087980672, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 33354261 + ... + 33354308.

Almost surely, 2^1601005656 is an apocalyptic number.

It is an amenable number.

1601005656 is an abundant number, since it is smaller than the sum of its proper divisors (2401508544).

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

1601005656 is a wasteful number, since it uses less digits than its factorization.

1601005656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66708578 (or 66708574 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1601005656 is about 40012.5687253393. The cubic root of 1601005656 is about 1169.8520902949.

The spelling of 1601005656 in words is "one billion, six hundred one million, five thousand, six hundred fifty-six".