2640754688 has 192 divisors, whose sum is σ = 6340239360. Its totient is φ = 1083801600.

The previous prime is 2640754679. The next prime is 2640754693. The reversal of 2640754688 is 8864570462.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20793281 + ... + 20793407.

It is an arithmetic number, because the mean of its divisors is an integer number (33022080).

Almost surely, 2^2640754688 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 2640754688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3170119680).

2640754688 is an abundant number, since it is smaller than the sum of its proper divisors (3699484672).

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

2640754688 is a wasteful number, since it uses less digits than its factorization.

2640754688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The square root of 2640754688 is about 51388.2738375206. The cubic root of 2640754688 is about 1382.2163307652.

The spelling of 2640754688 in words is "two billion, six hundred forty million, seven hundred fifty-four thousand, six hundred eighty-eight".