1601161000 has 32 divisors (see below), whose sum is σ = 3746719080. Its totient is φ = 640464000.

The previous prime is 1601160983. The next prime is 1601161013. The reversal of 1601161000 is 1611061.

It can be written as a sum of positive squares in 4 ways, for example, as 203747076 + 1397413924 = 14274^2 + 37382^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799581 + ... + 801580.

Almost surely, 2^1601161000 is an apocalyptic number.

1601161000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601161000 is an abundant number, since it is smaller than the sum of its proper divisors (2145558080).

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

1601161000 is a wasteful number, since it uses less digits than its factorization.

1601161000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601182 (or 1601168 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1601161000 is about 40014.5098682965. The cubic root of 1601161000 is about 1169.8899256028.

Adding to 1601161000 its reverse (1611061), we get a palindrome (1602772061).

The spelling of 1601161000 in words is "one billion, six hundred one million, one hundred sixty-one thousand".