2789687491820 has 12 divisors (see below), whose sum is σ = 5858343732864. Its totient is φ = 1115874996720.

The previous prime is 2789687491819. The next prime is 2789687491867. The reversal of 2789687491820 is 281947869872.

2789687491820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69742187276 + ... + 69742187315.

It is an arithmetic number, because the mean of its divisors is an integer number (488195311072).

Almost surely, 2^{2789687491820} is an apocalyptic number.

2789687491820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2789687491820 is an abundant number, since it is smaller than the sum of its proper divisors (3068656241044).

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

2789687491820 is a wasteful number, since it uses less digits than its factorization.

2789687491820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139484374600 (or 139484374598 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 71.

The spelling of 2789687491820 in words is "two trillion, seven hundred eighty-nine billion, six hundred eighty-seven million, four hundred ninety-one thousand, eight hundred twenty".