2091319876887 has 12 divisors (see below), whose sum is σ = 2914933567224. Its totient is φ = 1333595282800.

The previous prime is 2091319876883. The next prime is 2091319876927. The reversal of 2091319876887 is 7886789131902.

It is not a de Polignac number, because 2091319876887 - 2² = 2091319876883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091319876883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 658889364 + ... + 658892537.

It is an arithmetic number, because the mean of its divisors is an integer number (242911130602).

Almost surely, 2^{2091319876887} is an apocalyptic number.

2091319876887 is a deficient number, since it is larger than the sum of its proper divisors (823613690337).

2091319876887 is a wasteful number, since it uses less digits than its factorization.

2091319876887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317781950 (or 1317781927 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 69.

The spelling of 2091319876887 in words is "two trillion, ninety-one billion, three hundred nineteen million, eight hundred seventy-six thousand, eight hundred eighty-seven".