1129611805 has 8 divisors (see below), whose sum is σ = 1549181952. Its totient is φ = 774590928.

The previous prime is 1129611781. The next prime is 1129611827. The reversal of 1129611805 is 5081169211.

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 1129611805 - 2⁹ = 1129611293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16137277 + ... + 16137346.

It is an arithmetic number, because the mean of its divisors is an integer number (193647744).

Almost surely, 2^1129611805 is an apocalyptic number.

It is an amenable number.

1129611805 is a deficient number, since it is larger than the sum of its proper divisors (419570147).

1129611805 is an equidigital number, since it uses as much as digits as its factorization.

1129611805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274635.

The product of its (nonzero) digits is 4320, while the sum is 34.

The square root of 1129611805 is about 33609.6980795722. The cubic root of 1129611805 is about 1041.4611503957.

The spelling of 1129611805 in words is "one billion, one hundred twenty-nine million, six hundred eleven thousand, eight hundred five".