1601115618 has 8 divisors (see below), whose sum is σ = 3202231248. Its totient is φ = 533705204.

The previous prime is 1601115613. The next prime is 1601115623. The reversal of 1601115618 is 8165111061.

It is an interprime number because it is at equal distance from previous prime (1601115613) and next prime (1601115623).

It is a sphenic number, since it is the product of 3 distinct primes.

1601115618 is an admirable number.

It is a Curzon number.

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

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 3 ways as a sum of consecutive naturals, for example, 133426296 + ... + 133426307.

It is an arithmetic number, because the mean of its divisors is an integer number (400278906).

Almost surely, 2^1601115618 is an apocalyptic number.

1601115618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1601115618 is a wasteful number, since it uses less digits than its factorization.

1601115618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266852608.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1601115618 is about 40013.9427949809. The cubic root of 1601115618 is about 1169.8788726967.

Adding to 1601115618 its reverse (8165111061), we get a palindrome (9766226679).

The spelling of 1601115618 in words is "one billion, six hundred one million, one hundred fifteen thousand, six hundred eighteen".