2111628913 has 4 divisors (see below), whose sum is σ = 2111900580. Its totient is φ = 2111357248.

The previous prime is 2111628877. The next prime is 2111628929. The reversal of 2111628913 is 3198261112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 725332624 + 1386296289 = 26932^2 + 37233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111628913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111628313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123820 + ... + 139837.

It is an arithmetic number, because the mean of its divisors is an integer number (527975145).

Almost surely, 2^2111628913 is an apocalyptic number.

It is an amenable number.

2111628913 is a deficient number, since it is larger than the sum of its proper divisors (271667).

2111628913 is an equidigital number, since it uses as much as digits as its factorization.

2111628913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271666.

The product of its digits is 5184, while the sum is 34.

The square root of 2111628913 is about 45952.4636227482. The cubic root of 2111628913 is about 1282.9385840179.

The spelling of 2111628913 in words is "two billion, one hundred eleven million, six hundred twenty-eight thousand, nine hundred thirteen".