5611211209 has 8 divisors (see below), whose sum is σ = 5857341128. Its totient is φ = 5370053760.

The previous prime is 5611211201. The next prime is 5611211269. The reversal of 5611211209 is 9021121165.

It can be written as a sum of positive squares in 4 ways, for example, as 9437184 + 5601774025 = 3072^2 + 74845^2 .

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 5611211209 - 2³ = 5611211201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5611211201) 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, 1240812 + ... + 1245325.

It is an arithmetic number, because the mean of its divisors is an integer number (732167641).

Almost surely, 2^5611211209 is an apocalyptic number.

It is an amenable number.

5611211209 is a deficient number, since it is larger than the sum of its proper divisors (246129919).

5611211209 is a wasteful number, since it uses less digits than its factorization.

5611211209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486235.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 5611211209 is about 74908.0183224733. The cubic root of 5611211209 is about 1776.9922703607.

It can be divided in two parts, 561121 and 1209, that added together give a triangular number (562330 = T₁₀₆₀).

The spelling of 5611211209 in words is "five billion, six hundred eleven million, two hundred eleven thousand, two hundred nine".