2091786147860 has 24 divisors (see below), whose sum is σ = 4583740081536. Its totient is φ = 800335569440.

The previous prime is 2091786147827. The next prime is 2091786147917. The reversal of 2091786147860 is 687416871902.

It is a self number, because there is not a number n which added to its sum of digits gives 2091786147860.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2273680136 + ... + 2273681055.

It is an arithmetic number, because the mean of its divisors is an integer number (190989170064).

Almost surely, 2^{2091786147860} is an apocalyptic number.

2091786147860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2091786147860 is an abundant number, since it is smaller than the sum of its proper divisors (2491953933676).

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

2091786147860 is a wasteful number, since it uses less digits than its factorization.

2091786147860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547361223 (or 4547361221 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 2091786147860 in words is "two trillion, ninety-one billion, seven hundred eighty-six million, one hundred forty-seven thousand, eight hundred sixty".