2011640568 has 64 divisors (see below), whose sum is σ = 5902901760. Its totient is φ = 559218816.

The previous prime is 2011640557. The next prime is 2011640569. The reversal of 2011640568 is 8650461102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011640569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155596 + ... + 168027.

It is an arithmetic number, because the mean of its divisors is an integer number (92232840).

Almost surely, 2^2011640568 is an apocalyptic number.

2011640568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2011640568 is an abundant number, since it is smaller than the sum of its proper divisors (3891261192).

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

2011640568 is a wasteful number, since it uses less digits than its factorization.

2011640568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323676 (or 323672 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2011640568 is about 44851.3162348665. The cubic root of 2011640568 is about 1262.3606889775.

The spelling of 2011640568 in words is "two billion, eleven million, six hundred forty thousand, five hundred sixty-eight".