1601115616 has 48 divisors (see below), whose sum is σ = 3206676816. Its totient is φ = 786779136.

The previous prime is 1601115613. The next prime is 1601115623. The reversal of 1601115616 is 6165111061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601115611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708300 + ... + 1709236.

It is an arithmetic number, because the mean of its divisors is an integer number (66805767).

Almost surely, 2^1601115616 is an apocalyptic number.

1601115616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1601115616 is an abundant number, since it is smaller than the sum of its proper divisors (1605561200).

1601115616 is an equidigital number, since it uses as much as digits as its factorization.

1601115616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1601115616 is about 40013.9427699896. The cubic root of 1601115616 is about 1169.8788722096.

Adding to 1601115616 its reverse (6165111061), we get a palindrome (7766226677).

The spelling of 1601115616 in words is "one billion, six hundred one million, one hundred fifteen thousand, six hundred sixteen".