2791805540 has 24 divisors (see below), whose sum is σ = 5895190392. Its totient is φ = 1110551040.

The previous prime is 2791805537. The next prime is 2791805543. The reversal of 2791805540 is 455081972.

It is an interprime number because it is at equal distance from previous prime (2791805537) and next prime (2791805543).

It can be written as a sum of positive squares in 4 ways, for example, as 5654884 + 2786150656 = 2378^2 + 52784^2 .

It is not an unprimeable number, because it can be changed into a prime (2791805543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381989 + ... + 389228.

It is an arithmetic number, because the mean of its divisors is an integer number (245632933).

Almost surely, 2^2791805540 is an apocalyptic number.

2791805540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2791805540 is an abundant number, since it is smaller than the sum of its proper divisors (3103384852).

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

2791805540 is a wasteful number, since it uses less digits than its factorization.

2791805540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771407 (or 771405 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 2791805540 is about 52837.5391175630. The cubic root of 2791805540 is about 1408.0834312917.

The spelling of 2791805540 in words is "two billion, seven hundred ninety-one million, eight hundred five thousand, five hundred forty".