2640555316 has 48 divisors (see below), whose sum is σ = 5503680000. Its totient is φ = 1107561504.

The previous prime is 2640555287. The next prime is 2640555331. The reversal of 2640555316 is 6135550462.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 44010 + ... + 84958.

It is an arithmetic number, because the mean of its divisors is an integer number (114660000).

Almost surely, 2^2640555316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640555316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2751840000).

2640555316 is an abundant number, since it is smaller than the sum of its proper divisors (2863124684).

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

2640555316 is a wasteful number, since it uses less digits than its factorization.

2640555316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41021 (or 41005 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 2640555316 is about 51386.3339420122. Note that the first 3 decimals coincide. The cubic root of 2640555316 is about 1382.1815449808.

The spelling of 2640555316 in words is "two billion, six hundred forty million, five hundred fifty-five thousand, three hundred sixteen".