2011345664 has 18 divisors (see below), whose sum is σ = 4014835020. Its totient is φ = 1005672704.

The previous prime is 2011345649. The next prime is 2011345669. The reversal of 2011345664 is 4665431102.

It is a super-2 number, since 2×2011345664² = 8091022760183201792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2011345664.

It is not an unprimeable number, because it can be changed into a prime (2011345669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928154 + ... + 3928665.

It is an arithmetic number, because the mean of its divisors is an integer number (223046390).

Almost surely, 2^2011345664 is an apocalyptic number.

It is an amenable number.

2011345664 is a deficient number, since it is larger than the sum of its proper divisors (2003489356).

2011345664 is an frugal number, since it uses more digits than its factorization.

2011345664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856835 (or 7856821 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 2011345664 is about 44848.0285408400. The cubic root of 2011345664 is about 1262.2989991283.

Adding to 2011345664 its reverse (4665431102), we get a palindrome (6676776766).

The spelling of 2011345664 in words is "two billion, eleven million, three hundred forty-five thousand, six hundred sixty-four".