2011864405 has 8 divisors (see below), whose sum is σ = 2556251352. Its totient is φ = 1514815488.

The previous prime is 2011864403. The next prime is 2011864427. The reversal of 2011864405 is 5044681102.

It can be written as a sum of positive squares in 4 ways, for example, as 26894596 + 1984969809 = 5186^2 + 44553^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2011864405 - 2¹ = 2011864403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011864403) 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, 11834412 + ... + 11834581.

It is an arithmetic number, because the mean of its divisors is an integer number (319531419).

Almost surely, 2^2011864405 is an apocalyptic number.

It is an amenable number.

2011864405 is a deficient number, since it is larger than the sum of its proper divisors (544386947).

2011864405 is a wasteful number, since it uses less digits than its factorization.

2011864405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23669015.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2011864405 is about 44853.8114879884. The cubic root of 2011864405 is about 1262.4075085658.

The spelling of 2011864405 in words is "two billion, eleven million, eight hundred sixty-four thousand, four hundred five".