1601543560 has 64 divisors (see below), whose sum is σ = 3744630000. Its totient is φ = 615724032.

The previous prime is 1601543543. The next prime is 1601543591. The reversal of 1601543560 is 653451061.

It can be written as a sum of positive squares in 8 ways, for example, as 1442632324 + 158911236 = 37982^2 + 12606^2 .

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, 262626 + ... + 268654.

Almost surely, 2^1601543560 is an apocalyptic number.

1601543560 is a gapful number since it is divisible by the number (10) 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 1601543560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1872315000).

1601543560 is an abundant number, since it is smaller than the sum of its proper divisors (2143086440).

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

1601543560 is a wasteful number, since it uses less digits than its factorization.

1601543560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298 (or 6294 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1601543560 is about 40019.2898487717. The cubic root of 1601543560 is about 1169.9830908020.

The spelling of 1601543560 in words is "one billion, six hundred one million, five hundred forty-three thousand, five hundred sixty".