2087919191919 has 16 divisors (see below), whose sum is σ = 3043618848000. Its totient is φ = 1262636621760.

The previous prime is 2087919191867. The next prime is 2087919191971. The reversal of 2087919191919 is 9191919197802.

It is an interprime number because it is at equal distance from previous prime (2087919191867) and next prime (2087919191971).

It is not a de Polignac number, because 2087919191919 - 2⁸ = 2087919191663 is a prime.

It is a super-2 number, since 2×2087919191919² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2087919191919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2087919191999) 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 15 ways as a sum of consecutive naturals, for example, 69208419 + ... + 69238580.

It is an arithmetic number, because the mean of its divisors is an integer number (190226178000).

Almost surely, 2^{2087919191919} is an apocalyptic number.

2087919191919 is a deficient number, since it is larger than the sum of its proper divisors (955699656081).

2087919191919 is a wasteful number, since it uses less digits than its factorization.

2087919191919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138447470.

The product of its (nonzero) digits is 6613488, while the sum is 66.

The spelling of 2087919191919 in words is "two trillion, eighty-seven billion, nine hundred nineteen million, one hundred ninety-one thousand, nine hundred nineteen".