1611061243 has 16 divisors (see below), whose sum is σ = 1930464000. Its totient is φ = 1327186080.

The previous prime is 1611061237. The next prime is 1611061267. The reversal of 1611061243 is 3421601161.

It is a de Polignac number, because none of the positive numbers 2^k-1611061243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611061223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162768 + ... + 172381.

It is an arithmetic number, because the mean of its divisors is an integer number (120654000).

Almost surely, 2^1611061243 is an apocalyptic number.

1611061243 is a deficient number, since it is larger than the sum of its proper divisors (319402757).

1611061243 is a wasteful number, since it uses less digits than its factorization.

1611061243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335202.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1611061243 is about 40138.0273929848. The cubic root of 1611061243 is about 1172.2961805370.

The spelling of 1611061243 in words is "one billion, six hundred eleven million, sixty-one thousand, two hundred forty-three".