611110091 has 4 divisors (see below), whose sum is σ = 643273800. Its totient is φ = 578946384.

The previous prime is 611110081. The next prime is 611110147. The reversal of 611110091 is 190011116.

611110091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 611110091 - 2²² = 606915787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611110001) 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, 16081826 + ... + 16081863.

It is an arithmetic number, because the mean of its divisors is an integer number (160818450).

Almost surely, 2^611110091 is an apocalyptic number.

611110091 is a deficient number, since it is larger than the sum of its proper divisors (32163709).

611110091 is a wasteful number, since it uses less digits than its factorization.

611110091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32163708.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 611110091 is about 24720.6409908805. The cubic root of 611110091 is about 848.6067560907.

The spelling of 611110091 in words is "six hundred eleven million, one hundred ten thousand, ninety-one".