2640811812 has 24 divisors (see below), whose sum is σ = 6171014976. Its totient is φ = 878967648.

The previous prime is 2640811799. The next prime is 2640811819. The reversal of 2640811812 is 2181180462.

It is not an unprimeable number, because it can be changed into a prime (2640811819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154408 + ... + 170655.

It is an arithmetic number, because the mean of its divisors is an integer number (257125624).

Almost surely, 2^2640811812 is an apocalyptic number.

It is an amenable number.

2640811812 is an abundant number, since it is smaller than the sum of its proper divisors (3530203164).

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

2640811812 is a wasteful number, since it uses less digits than its factorization.

2640811812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325747 (or 325745 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 2640811812 is about 51388.8296422481. The cubic root of 2640811812 is about 1382.2262972540.

The spelling of 2640811812 in words is "two billion, six hundred forty million, eight hundred eleven thousand, eight hundred twelve".