2791349780880 has 80 divisors (see below), whose sum is σ = 8951570009280. Its totient is φ = 718692355584.

The previous prime is 2791349780839. The next prime is 2791349780881. The reversal of 2791349780880 is 880879431972.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2791349780881) 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 15 ways as a sum of consecutive naturals, for example, 200521042 + ... + 200534961.

It is an arithmetic number, because the mean of its divisors is an integer number (111894625116).

Almost surely, 2^{2791349780880} is an apocalyptic number.

2791349780880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2791349780880 is an abundant number, since it is smaller than the sum of its proper divisors (6160220228400).

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

2791349780880 is a wasteful number, since it uses less digits than its factorization.

2791349780880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401056048 (or 401056042 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 66.

The spelling of 2791349780880 in words is "two trillion, seven hundred ninety-one billion, three hundred forty-nine million, seven hundred eighty thousand, eight hundred eighty".