2611091891 has 8 divisors (see below), whose sum is σ = 2750175120. Its totient is φ = 2472174432.

The previous prime is 2611091843. The next prime is 2611091957. The reversal of 2611091891 is 1981901162.

2611091891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2611091891 - 2⁶ = 2611091827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2611091291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8420 + ... + 72753.

It is an arithmetic number, because the mean of its divisors is an integer number (343771890).

Almost surely, 2^2611091891 is an apocalyptic number.

2611091891 is a deficient number, since it is larger than the sum of its proper divisors (139083229).

2611091891 is a wasteful number, since it uses less digits than its factorization.

2611091891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82885.

The product of its (nonzero) digits is 7776, while the sum is 38.

The square root of 2611091891 is about 51098.8443215695. The cubic root of 2611091891 is about 1377.0214922247.

The spelling of 2611091891 in words is "two billion, six hundred eleven million, ninety-one thousand, eight hundred ninety-one".