2651440680 has 192 divisors, whose sum is σ = 9950653440. Its totient is φ = 599740416.

The previous prime is 2651440679. The next prime is 2651440691. The reversal of 2651440680 is 860441562.

2651440680 is a `hidden beast` number, since 26 + 514 + 40 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 239017 + ... + 249863.

It is an arithmetic number, because the mean of its divisors is an integer number (51826320).

Almost surely, 2^2651440680 is an apocalyptic number.

2651440680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2651440680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4975326720).

2651440680 is an abundant number, since it is smaller than the sum of its proper divisors (7299212760).

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

2651440680 is a wasteful number, since it uses less digits than its factorization.

2651440680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968 (or 10961 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2651440680 is about 51492.1419247636. The cubic root of 2651440680 is about 1384.0782321265.

The spelling of 2651440680 in words is "two billion, six hundred fifty-one million, four hundred forty thousand, six hundred eighty".