2111099640 has 64 divisors (see below), whose sum is σ = 6820480800. Its totient is φ = 519654912.

The previous prime is 2111099623. The next prime is 2111099681. The reversal of 2111099640 is 469901112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675075 + ... + 678194.

Almost surely, 2^2111099640 is an apocalyptic number.

2111099640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111099640 is an abundant number, since it is smaller than the sum of its proper divisors (4709381160).

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

2111099640 is a wasteful number, since it uses less digits than its factorization.

2111099640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353296 (or 1353292 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 2111099640 is about 45946.7043431844. The cubic root of 2111099640 is about 1282.8313869170.

The spelling of 2111099640 in words is "two billion, one hundred eleven million, ninety-nine thousand, six hundred forty".