5611656129 has 4 divisors (see below), whose sum is σ = 7482208176. Its totient is φ = 3741104084.

The previous prime is 5611656109. The next prime is 5611656131. The reversal of 5611656129 is 9216561165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5611656129 - 2⁸ = 5611655873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5611656109) 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 3 ways as a sum of consecutive naturals, for example, 935276019 + ... + 935276024.

It is an arithmetic number, because the mean of its divisors is an integer number (1870552044).

Almost surely, 2^5611656129 is an apocalyptic number.

It is an amenable number.

5611656129 is a deficient number, since it is larger than the sum of its proper divisors (1870552047).

5611656129 is a wasteful number, since it uses less digits than its factorization.

5611656129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870552046.

The product of its digits is 97200, while the sum is 42.

The square root of 5611656129 is about 74910.9880391388. The cubic root of 5611656129 is about 1777.0392357707.

The spelling of 5611656129 in words is "five billion, six hundred eleven million, six hundred fifty-six thousand, one hundred twenty-nine".