2111043657 has 16 divisors (see below), whose sum is σ = 2862970880. Its totient is φ = 1383443712.

The previous prime is 2111043637. The next prime is 2111043709. The reversal of 2111043657 is 7563401112.

It is not a de Polignac number, because 2111043657 - 2¹⁴ = 2111027273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111043617) by changing a digit.

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, 16113 + ... + 66945.

It is an arithmetic number, because the mean of its divisors is an integer number (178935680).

Almost surely, 2^2111043657 is an apocalyptic number.

It is an amenable number.

2111043657 is a deficient number, since it is larger than the sum of its proper divisors (751927223).

2111043657 is a wasteful number, since it uses less digits than its factorization.

2111043657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51072.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 2111043657 is about 45946.0951224367. The cubic root of 2111043657 is about 1282.8200472683.

Adding to 2111043657 its reverse (7563401112), we get a palindrome (9674444769).

The spelling of 2111043657 in words is "two billion, one hundred eleven million, forty-three thousand, six hundred fifty-seven".