2011505705 has 32 divisors (see below), whose sum is σ = 2795679360. Its totient is φ = 1373137920.

The previous prime is 2011505701. The next prime is 2011505707. The reversal of 2011505705 is 5075051102.

It is a happy number.

It is not a de Polignac number, because 2011505705 - 2² = 2011505701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011505701) 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, 368486 + ... + 373904.

It is an arithmetic number, because the mean of its divisors is an integer number (87364980).

Almost surely, 2^2011505705 is an apocalyptic number.

It is an amenable number.

2011505705 is a deficient number, since it is larger than the sum of its proper divisors (784173655).

2011505705 is a wasteful number, since it uses less digits than its factorization.

2011505705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5849.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 2011505705 is about 44849.8127643806. The cubic root of 2011505705 is about 1262.3324782462.

Adding to 2011505705 its reverse (5075051102), we get a palindrome (7086556807).

The spelling of 2011505705 in words is "two billion, eleven million, five hundred five thousand, seven hundred five".