2013509861 has 32 divisors (see below), whose sum is σ = 2383257600. Its totient is φ = 1682049600.

The previous prime is 2013509851. The next prime is 2013509879. The reversal of 2013509861 is 1689053102.

It is a de Polignac number, because none of the positive numbers 2^k-2013509861 is a prime.

It is a super-3 number, since 3×2013509861³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013509821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1167746 + ... + 1169468.

It is an arithmetic number, because the mean of its divisors is an integer number (74476800).

Almost surely, 2^2013509861 is an apocalyptic number.

It is an amenable number.

2013509861 is a deficient number, since it is larger than the sum of its proper divisors (369747739).

2013509861 is a wasteful number, since it uses less digits than its factorization.

2013509861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 2013509861 is about 44872.1501713479. The cubic root of 2013509861 is about 1262.7515791295.

The spelling of 2013509861 in words is "two billion, thirteen million, five hundred nine thousand, eight hundred sixty-one".